Reference Manual
IBM 24 Card Punch
IBM 26 Printing Card Punch

Minor Revision, October 1965
This edition, A24-0520-3, replaces A24-0520-2. The only signifkant changes are Figure 17, page 21, and the note added toAlphabetic Field-Limit Feature, page 26.

©1949, 1950, 1951, 1952, 1954, 1957, 1959, 1963 by International Business Machines Corporation

Copies of this and other mM publications can be obtained through IBM Branch Offices.
Address comments concerning the contents of this publication to:
IBM Customer Manuals, Dept. B98, PO Box 390, Poughkeepsie, New York

Contents

Introduction ............................................... .

5

Operating Features . ....................................... .
Program Card .....
Program Drum .

12
12Operations ................................................ .
Inserting Cards Manually.........
. .................. .
Numeric Punching with Program Control ........................ .
Alphabetic and Numeric Punching with Program Control
Error Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .............. .
Error Correction-Partially Prepunched Cards ..
Prepunched Master Card Insertion ...

14
14
15
16
17
18
19

IBM 26 Printing Features ....... .

20

Special Features . ............................... .

21

Program Card Preparation.

28

Operating Suggestions . ... .

32

Ribbon Replacement ........ .

35

Combination Keyboard Summary ..

36

Index ..................... .

38

8

Figure 1. IBM 26 Printing Card Punch

IBM 24 Card Punch
IBM 26 Printing Card Punch

The basic operating unit in IBM accounting is thepunched card. Punched cards, containing original datain the form of punched holes, actuate the IBM machines to perform automatically the various operations
essential to recordkeeping.
Transcribing original data to punched cards isaccomplished by any of several types of IBM card
punches. This manual explains the operation of twoof these machines, the IBM 24 Card Punch and the
IBM 26 Printing Card Punch (Figure 1).
These two machines are essentially alike in design,
features, and operation. The major difference is thatthe printing mechanism of the IBM 26 prints the characters on the cards as they are punched.
The machines are easy to operate, quiet, and attractive. One of their most important features is the simple
means of setting them up quickly for automatic control of skipping, or duplicating operations. Each setup,or program, is made by punching a card and mounting
it on a program drum, which is inserted in the machine.
The same program card can be used repeatedly for aroutine punching operation.
The card punch duplicates common informationfrom any card into. the following card in a gangpunch
operation. The duplication can be automatic or throughthe keyboard. This method of duplicating avoids muchcard handling and consequently increases production.
The duplicating feature greatly facilitates er:or correction during keypunching. When an error is made,the operator need not re-punch the whole card manually. Instead, without any card handling, the operator
duplicates into the next card all correctly punchedfields and re-keys only the field in error. The program
control permits such duplication, field by field, without concern about column numbers.
Duplication under program control proceeds at a
rate of 20 columns per second on the IBM 24, and 18
columns per second on the IBM 26. Skipping and card
release proceed at a rate of 80 columns per second.
After one card is punched in column 80, the next card
feeds into the column-l position in one-fourth of asecond.
Note: Where two speeds are indicated in this publication, the lower speed refers to the IBM 26 and thehigher speed to the IBM 24.
The almost complete visibility of the cards in thecard bed facilitates the design and punching of dual

cards and the identification of prepunched cards into
which more data must be punched. Direct access toall parts of the card bed also permits easy manual insertion and removal of cards when necessary.
The keyboards can be moved anywhere on the reading board, for the operator's greatest convenience andcomfort. A combined alphabetic and numeric keyboard utilizes a novel principle to facilitate the punching of cards containing both alphabetic and numericfields. A group of the right-hand typewriter keys serves
for punching digits as well as letters, with the shift
from one function to the other normally made automatically by the program card. This permits theoperator to punch an alphabetic field with both hands
and then, without shifting from the home position, topunch a numeric field with the right hand only. Useof the right hand alone for numeric punching frees
the left hand for document handling.
This publication contains a complete description of
the operating features and methods of operation.
Under Operations, each function is described in detailas it is first used in a typical situation. All functions andthe combination keyboard are summarized under Combination Keyboard Summary.
More information on these machines appears inthese publications:
IBM 357 Data Collection System
Installation Manual-Physical Planning
IBM 1001 Data Transmission System
Systems Reference Library Publication
IBM 26, Model 21 Interpreting Card
Punch Bulletin

A24-1032
A24-1029
G24-1000

Card Punching

Eighty columns on· the card can be punched, as shownin Figure 2.
Each column has twelve punching positions; oneeach for the digits 1 to 9, and one each for the zones
0, 11, and 12. The 11-zone punch is sometimes referred
to as X. As illustrated, digits are recorded by punchinga single hole in the corresponding digit or zero position of the desired column.
A letter is a combination of one zone-punch and one
digit-punch in the desired column. For example, A is
the 12-zone and digit-l punches, N is the ll-zone (X)5signed for use in a sales accounting application, anda typical invoice from which the card was punched.
The card contains, in punched-hole form, descriptive
information such as customer name, customer number,and location printed in the heading of the invoice, andquantitative data for the first commodity printed in
the body of the invoice. The fields on the card are in
the same sequence as the corresponding items of information on the invoice. This simplifies the readingof the original document as the information is being
punched.

and digit-5 punches, and Z is the O-zone (zero) anddigit-9 punches. Some machines have special-character
keys.
A special character is one, two, or three holes in thedesired column as shown in Figure 2. Punching of
two or three holes in one column for a letter or special
character is automatic when the corresponding key
is pressed.
A maximum of four punches can be duplicated intoa single column on the IBM 24 Card Punch. However,
duplicating in a single column on the IBM 26 Printing
Card Punch must be limited to multiple punches thatmake up a printable character, regardless of the settingof the print switch. This eliminates possible damage tothe printing mechanism.
Punched cards are usually designed so that each
item (or field) of information recorded in the card
can be readily identified. Figure 3 shows a card de-

The card form also illustrates other operations characteristic of many card-punching jobs. For example,
columns 1 through 17 are always skipped; columns
18 through 56 are punched in the first card for an
invoice, and duplicated into all other cards for thatinvoice; and columns 74 to 80 (invoice amount) may
be punched in some cards and skipped in others.
SpecialCharacters

DigitsLetters

0123456789

ABCDEFGHIJKLMNOPQRSTUVWXYZ•~I
00000000
1234567891

00000000
I

I

0000000000

19 20 21 2223 2425 26

I

111111111:Ii:

11111111- 2222222222

222222222

233333333333

3333333333

33444444444444

44444444444

5555555555555

4

12 Punching
Position
11 Punching
Position
00000000

05354555657515960 61 62 36 65

67374 757677 78 79 80

1111111111

12222222222

2

222222222

3

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3

3

333.33333

444

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44-44444444

555555555555

5555

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6

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8

II 81

88888888

11111111

III

99999999999999999 9999999999999999 99999999 9999999 9999999999999999999999999999

12345B7B9W"nUM~~nl ~wvn~NaHnHH~~~~~3$nu»~~u~«~u~uu~~~~~~"~"""~~U~~~u"~~nn n74~nnn~"

Figure 2. Punching Positions in Card

6

GENERAL MANUFACTURING COMPANY
ENDICOTT. N. Y.
CUSTOMER'S ORDER NO.

SOLD TO

311

INVOICI;: DATI;:

12-31

INVOICE NO.

12349

CUSTOMER NO.

59751

New Mexico C~
216 wysor Building
Houston, Texas

SHIP TO

Above

SHIPPED VIA

Truck Prepaid

TERMS'i!fo 10 Days Net 30

40
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Casters
Sq. Shank Swivel

11202
13102
17203
32105
44104
62110

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GENERAL MANUFACTURING COMPANY
Endicott. N. Y

COMMOD.TY No.

QUANTITY

SALESMAN

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AMOUNT

.83
.84
1.62
2.64
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Ext. Shank with Brk.
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Bolt and Nut ShankFreight

33.20
63.00
8.10

5.28

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Figure 3. Document and Punched Card

7

Operating Features

Figure 4 indicates the operating features describedhere.

The first two cards to be punched must be fed by key,
but all other cards in the hopper can be fed automatically, under switch control.

Card Hopper

The card hopper, with a capacity of approximately
500 cards, is on the upper right side of the machine.
Place cards in the hopper face forward, 9's down. A
sliding pressure plate ensures uniform feeding.
When the cards are in the hopper and the pressure
plate is in position, the top portion of the card above
the zero row is visible from the left edge of the cardthrough column 9, from column 29 through column 52,
and from column 72 to the right edge of the card
(Figure 5). Because cards feed from the front of thehopper, any markings in these three sections on thenext card to be fed can be seen while the card is stillin the hopper. This feature is most advantageous inpunching serially numbered cards or cards that are
partially punched and interpreted.
A card feeds from the hopper to the card bed automatically or when the operator presses the feed key.
Main-line
SwitchPunching Station

Punching is performed at the first of two stations in
the card bed through which the cards pass from rightto left. Usually, to start an operation, two cards are
fed into the card bed at the right of the punchingstation. As the second card is fed in, the first card isautomatically registered for punching-that is, it ispositioned at the punching station. While the firstcard is being punched, the second card is at the rightin the card bed. When column 80 of the first card
passes the punching station, the second card is registered at the punching station, and the next card in
the hopper is fed into the right of the card bed. Thismethod of card feeding minimizes the time required
for feeding and ejecting.
Card Hopper_ - - - - - Printing Mechanism
Card
Stacker_ - - - - - - Punching Station_ - - - Functional Control
Switches

Reading
StationKeyboard

Reading
Board

Figure 4. IBM 26 Operating Features8

Figure 5. Card Visibility in the Card Hopper

A single card can be placed in the card bed by hand
and registered in punching position by key.
The whole card is visible before it is registered, andat least 71 columns are visible after punching has
started. For example, when column 15 is to be punched(Figure 6), columns 1-12 and columns 22-80 are visible. This feature simplifies the design of dual cards
and facilitates keypunching. Information can be recorded (marked or printed) on a dual card anywhereother than in the two columns to the left or six columns
to the right of the column in which the information is
to be punched. The narrow pressure arm and theplastic guide in the right of the card bed must be considered, however, when designing dual cards. For
most efficient design, test the proposed design throughthe machine before placing an order for cards. Cards
with certain lower corner cuts cannot be fed satisfactorily through the card bed. (See Corner Cuts.)

Reading Station

The reading. station, where the cards are read for
duplicating, is about one card length to the left of thepunching station. Consequently, each card that has
been punched passes through the reading station as
the next card is being punched. The two cards movein synchronism, column by column, and information
to be duplicated is transferred from the first card to
the second. This principle of duplication is the same as
gangpunching. Reading from one card to another canbe controlled, field by field, so that only the desired
information is duplicated.
This feature eliminates card handling for the duplication of information from cards prepared during thepunching operation. Card handling is necessary only
when an operation requires duplication from prepunched master cards. In this case, insert the prepunched master card manually at the right of thereading station before the next card to be punched isregistered. Then, register both the master card and thedetail card at their respective stations by pressing theregister key.
The whole card is visible before it is registered at
the reading station, and at least 68 columns are visible
after reading has started. For example, when column
15 is being read, columns 1-8 above the 7-row andcolumns 21-80 are visible.

Card Stacker

The' card stacker, with a capacity of approximately
500 cards, .is on the upper left side of the machine on
a level with the hopper. After each card passes thereading station, it feeds into the stacker automaticallyor by key. Cards stack at an angle, 12's down, faceback, and are held in position by a card weight. Whenthe cards are removed from the stacker, they are in
their original sequence.
Main-Line Switch

The main-line switch is at the rear of the stacker. The
machine can be started about one-half minute after
the main-line switch is turned on. This allows sufficient
time for the electronic tubes to heat. When the stacker
becomes full, the switch automatically goes off.
When the main-line switch is turned on, press therelease key before starting operation. This ensures that9

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3 3 3 Visible
when3~column 15

is to be5 5 5 punched 5

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3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 Visible 3 3 3 3 3 3 333 333 3 333 333 33 33 33 3
when...- - - - - - - - - - column 15 ----~__- - - - - - - -. .
is to be5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 punched 5 5 5 5 5 5 5 5 5 5 5666666666666666666666666666666666666666666

666666666G666

7777777777777777777777777777717717771111771777771111111177
8888888888888888888888888888888888888888888888888888888888
9999, 1 3 "

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281930 3132 ~334l53631383940 41424344454641484950 5! 525354555651585960 61 6263&4&5 68&1 685910 11121314151611181980

Figure 6. Card Visibility at the Punching Station

the program card is at column 1 and that any card at
the punching station is released.
Reading Board

A reading board provides ample space for source documents from which the cards are punched. If extra
space is required, a larger reading board extending
about ten inches to the left of the standard board isavailable.

where it is read by a sensing mechanism. The drum revolves in step with the movement of the cards past
the punching and reading stations so that the programcodes control the operations, column by column. Thus,
the program unit affords a highly flexible means ofcontrolling automatic operations.
The program unit also controls printing functions as
described under IBM 26 Printing Features.

Program Control Lever
Backspace KeyThis key is below the card bed, between the readingand punching stations. As long as it is held down, thecards at the punching and reading stations backspacecontinuously until column 1 is reached. At the sametime the program card, which controls skipping andduplicating, also backspaces. Backspacing should not
be attempted after column 78 is passed without firstremoving the card from the card bed at the right.
The backspace key can also be used to release the
keyboard after it has been locked (described in Keyboard Locking) on IBM 24 punches with serial numbers
higher than 23639 or IBM 26 punches with serial numbers higher than 12260.

The program control lever, located below the program
unit, controls operation of the program unit. Turn on
this lever to lower the program sensing mechanism sothat it rests on the program drum, and the codes
punched in the program card control the various
automatic operations. Turn off the lever to raise theprogram sensing mechanism so that the program drum
can be easily removed or inserted. Turn this lever to
the OFF position whenever a program card is not in
the machine.

Column Indicator

Program Unit

The indicator, located at the base of the programdrum holder, indicates the next column to be punched.
Refer to this indicator as a guide for spacing or backspacing to a particular column.

The program unit controls automatic skipping, automatic duplicating, and shifting from numeric to alphabetic punching and vice versa. Each of these operations is designated by a specific code recorded in a
program card. The operator fastens the program cardaround a program drum and inserts it in the machine,

The pressure-roll release lever is next to the column
indicator. Press this lever to permit the manual removal of a card from the punching or reading station.

10

Pressure-Roll Release Lever

Normally, a card can be removed in one piece if it ispulled out with care. If torn pieces are caught at either
station, push them out with another card or a smoothedged metal blade while holding down the pressureroll release lever. Do not use saw-edged metal blades.
Chip Box and Fuses

The chip box is under the reading board. When it isremoved, the fuses for the machine are accessible.
Printing Mechanism

This feature is available only on the IBM 26 Printing
Card Punch.
Keyboards

The combination keyboards have the best featuresof both a typewriter and a numeric keypunch. The
letter keys are arranged for operation by the standard
typewriter touch system, while the digit keys areplaced so that a rapid 3-finger touch system can beused. The usual numeric keys on a typewriter havebeen eliminated; instead, a group of dual-purpose
keys at the right serves for digit punching as well as
letter punching. This permits numeric punching withthe right hand from the normal home position foralphabetic punching. The touch system for the ten
numeric keys is: index finger for digits 1, 4 and 7;
middle finger for digits 2, 5, and 8; and ring finger for
digits 0, 3, 6 and 9. The punching of a digit or a letterwith any of the combination keys depends on theshift of the keyboard. For example, pressing the 4-J
key punches a 4 when the keyboard is in numericshift, but a J when in alphabetic shift. This shifting issimilar to upper or lower case shifting on a standard
typewriter and may be controlled automatically by the
program unit or manually by key. The section containing the combination keys is readily distinguishable
by the blue area of the key plate. On the combination
keyboard, the fourth row of keys contains four specialcharacter keys at the left. These keys punch eightcharacters as shown on the key tops; four in numericand four in alphabetic shift.
The blue keys, which control functions of the machine, are explained under Operations.
The green correction key is explained under Special
Features.

Specify anyone of two types of cable-connected keyboards: Figure 7 shows the numeric keyboard only
(two special characters: - and &).
Figure 8 shows the combination alphabetic and numeric keyboard ( four additional special characterkeys-ll special characters in all).
On all keyboards, the punching keys are gray withblue lettering and the control keys are blue with whitelettering. The home keys are more concave than theother keys to facilitate accurate touch operation. The
keyboards are so interlocked that no two character
keys can be completely pressed at the same time, but
it is not necessary to wait for one key to rise before
pressing another. This design permits rolling of keys.
To punch multiple digits manually in one column,
hold down the MULT PCH (multiple punch) key whilepressing the keys one at a time. If the punch is not
equipped with a multiple punch key, use the space bar.

Two ON-OFF switches, controlling automatic functions,are explained under Operations. A third switch, to con-Figure 7. Numeric Keyboard

Figure 8. Combination Alphabetic and Numeric Keyboard

Function Control Switches

11trol printing, is explained under IBM 26 Printing Features. These three switches are:with the automatic-skip-and-duplicate switch, whichmust be on to start the duplicating automatically.

AUTO FEED
AUTO SKIP AND AUTO DUP
PRINTProgram Card
A program card, which is a basic part of the program
unit, is prepared for each punching application andcan be used repeatedly. Proper punching in this program card controls the automatic operations for thecorresponding columns of the cards being punched.
The control punching required in the program carddepends on the functions to be controlled, that is,skipping, duplicating, and alphabetic punching. Eachrow in the program card serves a specific purpose inthis respect.
Field Definition (12)Punch a 12 in every column except the first (left-handposition) of every field to be skipped, duplicated, or
manually punched. These 12's serve to continue tothe end of a field, any skip or duplication started within that field. Treat as a single field several consecutive
fields to be automatically skipped or duplicated as one.field. Don't program a single-column field with a 12-code.
The 12's punched in the program card for manually
punched fields permit occasional skipping or duplicating. This skipping or duplicating is started by key
and is carried across the field by the 12's. This type ofskipping is similar to an X-level skip on other IBM card
punches; the occasional duplicating may be desiredin the case of two or more cards with the same information, or in the duplication of the correct fields of anerror card.
Automatic Skip (11)An 11 punched in the first column of any field automatically starts a skip, which is continued over thatfield by the 12's punched in the remaining columns of
the field. If a single column is to be automaticallyskipped, punch it with an 11. This coding operates withthe automatic-skip-and-duplicate switch, which must
be on to start the skipping automatically.
Automatic Duplication (0)A zero punched in the first column of any field automatically starts duplication, which is continued overthat field by the 12's punched in the remaining columnsof the field. If a single column is to be automatically
duplicated, punch it with a zero. This coding operates
12

Alphabetic Shift (1)When the program card is in the machine, the combination keyboard is normally in numeric shift, andpressing anyone of the 2-purpose keys causes a figure
to be punched. To punch a letter, the combination keyboard must be shifted for alphabetic punching. This
shifting is performed automatically by a 1 in the program card in each column of the alphabetic field.
During duplication of alphabetic information, the 1's
permit automatic spacing over blank columns and prevent X-skipping caused by letters containing X-punches(J through R).
On a numeric machine, the only function of the 1's
is to permit automatic spacing over blank columns
when duplicating.
Program Card Codes

The four basic program codes are summarized here
and are illustrated in Figure 9. Two additional codes,
which control printing features of the IBM 26, are also
listed here and are explained under IBM 26 Printing
Features.
Code
12
11

o
1
2
3

Function
Field Definition
Start Automatic Skip
Start Automatic Duplication
Alphabetic Shift
Left Zero Print
Print Suppressio_n

The other digit rows, in the program card, control
functions with the alternate program feature. (See
Special Features.)

Program DrumThe program card is mounted on a program drum for
insertion in the machine. The program drum has aclamping strip to hold the card, and a handle on the
top to tighten or release the strip. To fasten a cardaround the drum (Figure 10) :1. Hold the drum in a horizontal position with thehandle to the right. Turn the handle away (counterclockwise direction) as far as it will go. This loosens
the smooth edge of the clamping strip.
2. Insert the column-80 edge of the card under thesmooth edge of the clamping strip. Two alignment
check holes in the clamping strip make it possible
to see that the card is Hush with the metal edge
under the strip. The card should be positioned sothat the 9's edge is against the rim of the drum.

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088888888 8 8 818 8 ..- 8888888888888888888 8888 8 8 818 8 8 8 8 8 818 8 8 8 8 8 818 8 8 8 8 8888888 I 0 888888888
1
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1
..99999999 9 9 919 9 ;; 999999999999999999999999991999999919999999199999999999 9 9 :::> 9 9 9 9 9 9 9 9 91234567 8 9 10 1111213 "'51611 18 19202122232425262128293031 3233j 353 3138394041434344

5464148'9150515253545;5"515a~96061626lb46566;76861« 121314J~"'1I18J~g,:.-

Figure 9. Program Card

3. Turn the handle to the center position. This tightens
the smooth edge of the clamping strip and loosens
the toothed edge.
4. Wrap the card tightly around the drum and insert
the column-l edge under the toothed edge of theclamping strip.
5. Turn the handle toward you (clockwise direction)
as far as it will go. This fastens the toothed edgeof the clamping strip. The drum is now ready to beinserted in the machine.
To remove a card from the drum, reverse the procedure.
With the program sensing mechanism raised, place
the drum on the spindle under the center cover of thepunch, positioned so that the aligning pin falls in thealigning hole in the column-indicator dial. Turn on the
program-control lever to lower the reading star wheels
onto the program card, and press the release key toengage the reading mechanism fully. Whenever the
drum is to be removed, first turn off the program-controllever to raise the star wheels.

To keep the program card for each punching application on a drum ready for insertion in the machine,order extra drums.

Clamping Strip

Aligning

Figure 10. Program Drum

13

Operations

Inserting Cards Manually
In certain instances it is desirable to insert cards manually, one at a time, as in the case of making over adamaged card or correcting an error found while
verifying. Also, when an individual card accompanies
each original document, manual insertion is necessary.
A card can be manually inserted in the card bed to
the right of either the punching station or the reading
station. Do not insert a single card in the hopper.
In this illustration (Figure 11), cards prepunchedwith part code are to be punched with part name,which is written on an accompanying ticket.
REGISTER KEY

Press this key:
1. to register (advance into position) for punchingcolumn 1 of the card at the right of the punchingstation
2. to register for reading column 1 of the card at theright of the reading station.
3. to stack a card from the left of the card bed.
Because it does not feed a card from the hopper, thiskey is usually used when cards are inserted manually.
NUMERIC SHIFT KEY; ALPHABETIC SHIFT KEY

When a combination keyboard is installed and thecard punch is operated without program control, thekeyboard is in alphabetic shift. When the programcontrol lever is turned on, the keyboard is in numericshift for all columns except those punched with thealphabetic field coding in the program card. If it isnecessary to punch occasional digits with the program
off or in an otherwise alphabetic field (such as Motor
Generator 12), hold down the numeric shift key whilepressing the digit keys. Similarly, when it is necessary
to punch some letters in an otherwise numeric field(such as 123B6), hold down the alphabetic shift key
while pressing the letter keys. These are non-locking
and must be held down when used.
When duplicating, press the alphabetic shift key
to permit automatic spacing over blank columns and toprevent skipping caused by X-punching.

RELEASE KEY

Press the release key to advance the cards registeredat the punching and reading stations past those stations. When the operator releases a card because of anerror, common information in fields beyond the release
column is preserved. With program control ON, thecard punch automatically punches the fields programmed for automatic duplication. Thus, a card canbe released at any time without losing master-card
information.

PART CODE

PART NAME

11 89: 652 23 1
r PART CODE ILASJ SERIALOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO~o00000000000000000000000000

113'56'89m"~n~~mn~~~"Vn~1~PUU~MU~~~~VH~~~~Q«~UUUU5~~5+'~~P~9~~U~~~"p~~~nnnu~nHnn~~ 11111111111111111111111111111111111111111111111111 D l ' I " " " 1 " " ' 1 ' 1 ' 1 ' 1 ' 1 ' 11111!!! 2222222222222222222222 'J 2 22222222222222222222222222222122 DD 222222 222 2 2 222 2 2 222 2222

I

3 J 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 313 3 3 3 D33 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3Key Punch-...... Prepunched ~44444444444444444444444444444444444444444444444444444144444 444444444444444444444

I

5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 515 D5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 566S66666666666666666666666666666666666666666666666666 1D66666666666666666666666666

I777777777777777777777777777777777777777777777711777771777777777771771717777777777
I

8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 D818 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8I~9999999999999999999999999999999999999999999999999999 ~99999~999999999999999999999
113'56'89~"~na~~n~W~"nnN2Upun~Mn»~~HVH~~~~Q«~UUU~5

Figure 11. Inserting Cards Manually

141~"'"~PU9~~UU"~"u""~nnnU~nHnn~

Procedure for Inserting Cards Manually (Figure 11)l. Place a card in the card bed at the right of thepunching station.
2. Press the register key to advance. the card into
punching position.
3. Punch part name, starting in column 1; press thenumeric shift key when necessary.
4. After punching the part name, release the card.
5. Insert the next card in the card bed at the right ofthe punching station and press the register key.
This registers the first card at the reading stationand the new card at the punching station. After thesecond card is punched, press the release key torelease the first card at the left of the reading station. It moves into the stacker when the third cardis registered.

Numeric Punching with Program Control
Usually, in a punching operation, the cards are in thecard hopper and feed into the card bed automatically.
Also, as the cards are punched, the program card controls the automatic functions such as skipping andduplicating.
In this illustration, labor distribution cards are to bepunched with numeric information according to thefields shown. Figure 12 shows how the card is punched
to serve as a program card, indicating the type of operation to be performed in each field. Columns 3-6 and34 and 35 are to be automatically duplicated; columns
48-80 are to be automatically skipped; all other fields
are to be keypunched.
FEED KEY

In an automatic feeding operation, this key ordinarily
is used only at the beginning to feed the first two cards
from the hopper into the card bed. Press the key twiceat this time. Press it first to feed the first card from thehopper. Press it again to register the first card at thepunching station and to feed the second card into thecard bed beneath the right end of the first card.
The feed key is inoperative when a card is registeredat the punching station, unless the main-line switch
has been turned off and then on again.
AUTOMATIC SKIP AND DUPLICATESWITCH

When this switch is ON, the program punching forautomatic skipping and automatic duplicating is effective. When this switch is OFF, the 11 (start automaticskip) and 0 (start automatic duplication) codes in the
program card are nullified. Automatic skipping proceeds at the rate of 80 columns per second; automatic
duplicating, at 20 columns per second (IBM 24), and18 columns per second (IBM 26).
On the IBM 26 Printing Card Punch, multiplepunched columns that deviate from standard alphabetic or special-character punching should not be
programmed for automatic duplication.
AUTOMATIC-FEED SWITCH

When the automatic-feed switch is ON and column 80
of a card passes the punching station, a new card feeds
automatically. At the same time, the card in the leftof the card bed is stacked, the one in the center isregistered at the reading station, and the one at theright is registered at the punching station. This automatic feeding occurs when column 80 of the card
passes the punching station by anyone of the threepossible operations-punching, skipping, or releasing.
Procedure for Numeric Punching with Program Control

Press this key:l. to feed a card from the hopper to the card bed
2. to register a card at the punching station
3. to register a card at the reading station
4. to stack a card.

Figure 12 shows the program card for this procedure:
1. Place unpunched cards in the card hopper.
2. Press the feed key twice to feed two cards into thecard bed. The first card registers automatically as
the second card feeds.

o oon nn nnn nnnn nnnn n nnnnn n. nEMPLOYEE
nnnn nn nnn nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

KIND

RATES

DATE

PART ORACCOUNTNO.

PIECES.. ...
..,:ci~g. oris~ORDER NO.

-A-

NO.

HOUR

AMOUNTn~i :lElli DIP!. CLOCK
o000 0 0 010 0 010 0 0 o010 0 0 o010 0 0 00 0001000 00 00000 0010 00100 000000000800000000000000000000000
1 2 3 4 5 6 118 9 lOin 12 13 14 15~16 1118 19201212223 242 2621281293031 323 3435 36313839·40 414214 444514647 8~~~~~~~~N~~~~~~H~~"~"ronnnM~nnn~~
1 1 1 11 1 111 1 111 1 1 111111 111111 11 1111111 11 11 11111 1 1II 111111 11111111111111111111111111111111
MO. DAY REG.

I

O. T.

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no

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2 2 2 2 2 2 212 2 212 2 2 2 212 2 2 221222 22 2 2 212 2 2 22 22 22222 2212 2 212 2 2 22222222222222222222222222222222
I

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3 3 3 3 3 3 313 3 313 3 3 331333 3 313 3 3 33 3 3 313 3 3 H 33 33333 3313 3 313 3 3 3 3 3 3
I

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LABOR DISTRIBUTION

33333

Figure 12. Numerical Punching15

3. Keypunch columns 1 and 2 (program card punchedwith a 12 in column 2) .
4. Columns 3-6 are programmed for automatic duplication (program card punched with a 0 in column
3 and 12's in columns 4-6). Key manually the Brst
card of each date group with the automatic-duplicate switch OFF. Then, turn on the switch and thedate in each succeeding card is automatically duplicated from the preceding card. Thus, no card
handling is necessary even for changes in information being automatically duplicated.
5. Keypunch columns 7-33 (program card punchedwith a 12 in each column except the first position ofeach field).
6. Columns 34 and 35 are programmed for automatic
duplication (program card punched with a 0 incolumn 34, and 12 in column 35). In the samemanner as date in columns 3-6, key manually themachine group for the first card of each group and
it is automatically duplicated in other cards.
7. Keypunch columns 36-47 (program card punchedwith a 12 in each column except the first position ofeach field).
8. The card punch automatically skips columns 48-80(program card punched with an 11 in column 48,
and 12's in columns 49-80). The automatic skip andduplicate switch must be ON.
9. With the automatic-feed switch ON, an automatic
feed occurs after column 80 is skipped.

Alphabetic and Numeric Punchingwith Program Control
Although the keyboard is normally in numeric shift
when the program is turned on, alphabetic information
can be punched by changing to alphabetic shift. Thisis done either manually by pressing the alphabeticshift key or automatically by coding in the programcard. Columns 6-26 of Figure 13 illustrate the 1 coding
for the automatic shift to alphabetic position. If a field
is to be punched with both alphabetic and numericcharacters, program it for whichever are more fre-~quent; if there is about an equal number of each, program the field for alphabetic punching.
In punching alphabetic names or descriptions thatvary in length, it is usually desirable to skip over thatpart of the field, at the right, which is not used. In thisillustration, a portion of the name field should beskipped on most cards. Because the starting point of
this skipping varies from card to card, it must be controlled manually by pressing the skip key.
Another type of skipping that must be controlled by
key is illustrated in the trading-area field. The tradingarea code is to be punched for some customers but notfor others. In the latter case, column 75 is to be xpunched to indicate that no code was supplied, andthe rest of the field is to be skipped. The 11-punch isused for control in later operations.
When a field is to be punched with the same information in a few successive cards, only the first card
must be manually punched; the field in the following
cards can be punched by pressing a single key. In thisillustration, salesman number in columns 78 and 79
may be the same for several consecutive cards and canbe duplicated by key.
SKIP KEY

Press this key to skip any field coded with 12's in the
program card. Pressing the key starts the skip, and the
12's in succeeding columns of the field continue theskip for the rest of the field. This key is primarily forskipping the unused right-hand portion of an alphabetic field. The card punch skips 80 columns per
second.
Numeric fields skipped with this key are blank andcannot be duplicated later, as in correcting punchingerrors.
DASH SKIP (OR) DASH KEYWhen the keyboard is in numeric shift (-SKIP),
pressing this key punches an 11 and causes skipping
for the rest of the field as determined by the successive
columns punched 12 in the program card. This skipping is at the rate of 80 columns per second. When the

DDDD DDDDDDCDDDDDDDDDDDDD DDDDDDDDDDDDDDDDD~~~DDDDDDDDD D DDDDDDDDDD CDS·
DDD DD D
CUSTOMER .AME. ADDRESS.
CARRIER NAME~.......

i"' ...~
co

TOMER
NO.

i .,;
DTUDIISAIEl

ai... =:l

00000 000000800000000000000 000000000000000000000000000000 00 00000000000 0000 0000 000

1 2 3 4 5 11"~"~QM~~OUUmnnnU~H vaam~U»M».p.H~~~a"~.~ •• ~~~~~D~ 5118 5910 6112 83 M &5 6117 II II 111112n 14 151111 1111l1li

1 1111 ~DDDDDDDDDDDDDDDDDDDD 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 11 11 1 11 11 1 11 11111111111 1111 1 l I t I 11
HEADING CARD

22222 222222222222222222222 222222222222222222222222222222 22 22222222222 2222 2222 222
33333 333333333333333333333 333333333333333333333333333333 33 33333333333 3333 3333 333

Figure 13. Alphabetic and Numerical Punching16

keyboard is in alphabetic shift (-), pressing this key
punches an 11, but does not cause skipping. The 11hole can be used for special character (-) printing.
Numeric fields skipped with this key can be duplicated later in card correction because the duplicationof the X causes the rest of the field to be skipped.
DUPLICATE KEY

Use this key to duplicate any information manually
punched in one card and common to one or more
successive cards. Pressing this key at the beginning ofa field starts duplication, and the 12's punched in the
program card continue the duplication for the restof the field.
With program control, duplication is at the rate of
18 or 20 columns per second; without program control,
duplication is at the rate of 9 or 10 columns per secondand occurs only as long as the key is held down. Thislatter type of duplication permits the operator to haveprecise column control and is used in re-punchingdamaged cards or correcting errors found during averifying operation.
Pressing this key for the duplication of blank columns in a field programmed for numeric punchingshould not be attempted because it locks the keyboard.
Unlock the keyboard by pressing the backspace keyor the alphabetic-shift key on a combination keyboard.
With the IBM 26 Printing Card Punch, do not duplicate multiple-punched columns that deviate fromstandard alphabetic or special-character punching.
Procedure for Alphabetic and Numeric Punchingwith Program Control

Figure 13 shows the program card for this procedure:
1. Place a deck of unpunched cards in the card
hopper, and press the feed key twice to feed two
cards.
2. The card punch automatically skips columns 1-5(program card punched with an 11 in column 1
and 12's in columns 2-5). The automatic skip andduplicate switch must be on.
3. Punch columns 6-26 with customer name, address,
or carrier name (program card punched with l's
in columns 6-26). The 1's automatically shift the
keyboard from numeric to alphabetic punching.
When figures are to be punched in this field, press
the numeric-shift key.
4. Press the skip key at the end of the alphabetic
punching to skip over the rest of the field (program card punched with 12's in columns 7-26).
5. Columns 27-56 are skipped automatically (program card punched with an 11 in column 27 and12's in columns 28-56).

6. Keypunch carrier code in columns 57 and 58 (program card punched with a 12 in column 58).
7. Columns 59-69 are skipped automatically (program card punched with an 11 in column 59 and12's in columns 60-69).
8. Keypunch customer number in columns 70-73(program card punched with 12's in columns
71-73).
9. Column 74 is skipped automatically (program card
punched with an 11).
10. The trading-area field in columns 75-77 is codedin the program card for manual numeric punching (blank in column 75 and 12's in columns 76
and 77). Optional X-skipping of the field is controlled by pressing the dash-skip key, which also
punches an 11 in column 75.
11. Keypunch columns 78 and 79. Salesman number isfrequently the same for several successive cards.
After keypunching the first card, duplicate thefollowing ones by pressing the duplicate key incolumn 78.
12. Keypunch column 80, after which the next card
feeds automatically. The automatic-feed switch
must be on.

Error Correction
Errors in punching are often noticed and corrected by
the operator at the time they are made. Usually thisinvolves re-keying a large portion of the card. This
card punch reduces re-keying to a minimum, requires
no concern about the precise column in which theerror occurred, minimizes the possibility of making
another error while correcting the first, and practicallyeliminates card handling. As an example, the correction of an error in the pieces field of the labor distribu tion card (Figure 14) is made as follows:
1. Press the release key immediately upon detecting
the error. This advances the card without punching
the fields coded for manual punching, but allows
duplication of the fields programmed for automatic
duplication beyond the point of release. Therefore,columns 34 and 35 are duplicated into the error
card as it is being released. This retains the common
information for duplication into the following cards.
The three cards in the card bed advance to theirproper stations and a new card feeds from thehopper.
2. Duplicate the kind field by pressing the duplicate
key once.
3. Columns 3-6 are programmed to duplicate automatically, as shown in Figure 12.
4. Manually duplicate the regular rate, overtime rate,
and part of account-number fields by pressing the17

RATES

DATE
KINO

MO. DAY REG.

O.T.

PART ORACCOUNTHO.

PIECES...

~~ORDER NO.

... EMPLOYEEHOURS AMOUNTNO.
... in. CUiCK.

~i c~;..

000001 O!OOO!O 00 0~1~ DOD 0'00 0 0 0 OOO~DOOO ~o 00 00000,000 1000 0 0000000000000000000000000000000
1 2 3 5. 71. 9 1~ 1112 13 " 15 16"17 1 112Oi;; 22 23 24 25 p..n 21 30 31 32 33 3137 .3I40414243"4S~"7"411 ~~~9M""~ •• 40naa .... n •• 20nnn24n20nnn.
11
1 0 11 D1111111111111111111111111 111111111 1M
11111 :111 :1111 1 1 1 1 1 1 1 11 1 1 1 1 1 1 11 1 1 1 1 1 1 11 1 1 1 1 1 1

I

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':" ':" '0,12" 'If:, ~" I
3 3333313331333331333 3:3 ~33 333133333 33 33

222122222 22 22 !'oUI2 2~212 212 2 2 2 2222222222222222222222222222222
Automatic
33 3 3 3 LABOR DISTRIBUTION 33 333
Duplication
Columns 34-35 4444444444444444444444444444444

1 I
444444~44~44444~44 4~ 444 444~4444 44 44
5 5 5 5 50 5:0 55'50 5 5 5i5 0 5 0 1 5 5 5 5 555155555 55 55 5 5 5 5 5:5 5 515 5 5 5 5555555555555555555555555555555
6 &60 6 6 616 6 6:6 6 6 6 616 6 I ~ 16 6 6 6 6 666166666 6& 66 6 6 6 6 6:6 &616 6 66 6666666 66 6 6 66 6 &&6 66 6 6 6 66 6 6 6 6 66 6

I

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77 7 7 7 7 717 77i1l7 17 717 7 r 7 1i7 7 7 7 777171717 70 77 7 7 7 7 717 7 717 7 7 7 77 7 77 7 7 77 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7
88 8 8 8 8 a'8 88'S 81 Transposition

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Error

8 a 888188888 88 88 8 8 8 8 8:8 8 818 8 8 8 88 8 8 8 8 8 8 8 8 88 8 88 8 8 88 8 8 88 88 8 8 8 88 8

II

999,99 99 9 99 99 9 9 9 9 919 9 9,9 9 9 9 9999999999999999999999999999999
9123'
9 9 9 95 9'71.
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919 9 ~I~ 9J~16171~ 19211i2l2U~ ~i~ ~ 9 2U
9 9 2627210211303
32~ 3431 3U 3I31t .. 42\41444104S4 .... • ~~9M".~ ••• 41aa .... n •• 20nnn24n20nnn.

=

Figure 14. Error Correction

duplicate key at the beginning of each field. Duplication stops at the end of the part or accountnumber field.
5. Re-key the pieces field, and manually punch theremaining fields programmed for manual punching. Machine group is automatically duplicated, andcolumns 4S-S0 are automatically skipped.
6. Remove the error card from the stacker.

Error Correction-Partially Prepunched Cards
Partially prepunched cards may contain prepunchednames or codes, or they may be serially numbered andpunched. When an error is made in punching cards ofthis type and the correction is to be made immediately,
automatic feeding from the hopper must be interrupted and a blank card must be inserted manually inthe card bed. Because each card feeding from thehopper contains some prepunched data, it is not possible to duplicate into the following card as outlined in
Error Correction.
The commodity card in Figure 15 illustrates a partially prepunched card for which the punching is to becompleted. The commission class, commodity description, commodity code, and price fields are prepunched;
the remainder of the card is to be keypunched. The
commodity code and description are interpreted forpulling from a file. If an error is made in the keying ofcolumn 14 (salesman field), make the correction thisway:l. Turn off the automatic-feed switch. This prevents
feeding a card from the hopper and registering the18

card from the right of the card bed when the error
card is released.
2. Press the release key. The error card advances
past the punching station without punching, except for the date field (columns 70-75), which is
programmed for automatic duplication. The duplication of this field retains the date for duplication into the correction card.
3. Tum off the automatic-skip and duplicate switch
to prevent automatic skipping during the correction of the error card. The prepunched fields areprogrammed for automatic skipping, but whencorrecting an error these fields must be manually
duplicated into the blank card.
4. Remove the card following the error card fromthe right of the card bed.
5. Insert a blank card in the right of the card bed.
6. Press the register key to register the error card at
the reading station and the blank card at thepunching station. This also stacks the card fromthe left of the card bed.
7. Manually duplicate the invoice number, branch,and customer number fields, which were punchedcorrectly, by pressing the duplicate key at the
beginning of each field.
S. Re-key the salesman field.
9. Manually duplicate the commission class, commodity description, commodity code, and pricefields by pressing the duplicate key in column 16.
These fields are programmed as one field, forautomatic skipping in the regular punching opera-

COMMODITY CARD

DDDDDD DDDDDD 00000 DOD/ DODDCODl o 10000 DO DDDDDDDDDDDDDDDDDDDDDD DDDDDDODODD 00000
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1 345851 5215354
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11 11 1 11 11111 111 111 DDDDODDDDDDDDDDDDDDD 1'11'1
111:111 11111111 11111,11 11,11111 11111, ,I 1 1111'11
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7 8 9101112 13 1415 16·1118 am~UnM~aUaH~~~~M~S~S 311140 41142 43 4445 48 47,. 48 50

55 16 57 58

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82 13 84 85 66 67\- 8t

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33 33 3 3'3 3 3331333 3 3 3 3 3,3 3 3 3 3 3 3:3 3 33133:33 33333

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44444 44 44 44 4 444 444 44444444444444444444 4:44144 44 44'4 4 444'444 44444144
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66666 66 66666 &&6 &&&666666666666666 && 6 6& 6,66,66 66 66:6 6 6 6 61& 6 6 66 &6 6.'& 6 -Ii 6 6 6 6,6 6 66'66,66 66666
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17717 17 77177 177 177 7 77777777777777777777 7:7717 717777:77 777 ' 777 17 77 77~77 77777 ' 77 7 7'7 7'7 7 77777
INVOICE
NO.

CODE

COMM
BR. CUSJ~MER SALES- CLASSMANCOMMODITYDESCRIPTION

CODE

PR'CE

QUANTITYCOSTAMOUNTSAlES
AMOUNT

DATE

MO.j DAYI YR.

~

5999999999999999999999999999999999999 9 ~1~19 919 9 9 9 9 919 9 9 9 9,9 9 9 9 9 9 9 919 9 9 9 9 9 919 9 9 9'9 9!9 9 9 9 9 9 9
1 2 3 4 5 " 7 • 9 1011121314151611 l' 1.20 2122 23 24 25 21 fl2IB 30 3132 33 34 35 36 37 38 31140 41142 43 44 45 46 47148 49 50 5152,53 54 55 58 57 58 59 soIS1 82 83 64 85 66 &71 ... 10 11172 13U47

n 78 79 80

Figure 15. Error Correction-Partially Prepunched Cards

tion. The commodity description field is codedwith 1's in the program card to permit automatic
spacing over blank columns during the correctionof errors made in the punching operation.

2. After the last card is released from the punchingstation, manually move it to the left until it touches
the feed rolls at the reading station.

10. Turn on the automatic-skip and duplicate switch
for the automatic duplication of date and theautomatic skipping of the last four columns.

3. While still maintaining a slight pressure on thecard against the feed rolls, press the release key toadvance that card past the reading station.

11. Manually punch the remaining fields programmed
for manual plITlching. The date is duplicated automatically and columns 77-80 are skipped automatically.

4. Place the master card in the card bed between thepunching and reading stations. Position it so thatthe left edge is just between the feed rolls and not
in registered position.

12. Replace, in the right of the card bed, the card
removed in step 4.
13. Press the feed key to register the correction card
at the reading station and the replaced card at thepunching station. This feeds the next card fromthe hopper, and stacks the error card.

5. Press the feed key to register the master card andthe detail card which is at the right in the card bed,
and to feed a new card from the hopper. Turnon the automatic-feed switch. Normal punching of
the first card of the new group can then proceed,with automatic feeding of the following detail cards.

14. Remove the error card from the stacker.
15. Turn on the automatic-feed switch and continue
the operation.

6. If the master card is not to be stacked with thedetail cards, remove it immediately after completion of the punching of the first detail card.

Prepunched Master Card Insertion

7. This kind of operation normally precludes the possibility of automatic duplication of any common
information (such as date) from one group of cards
to the next, because the continuity of such duplication is interrupted by insertion of the prepunchedmaster cards. Consequently, when common punching is required, the information must be manually
punched in the first card of each new group. This
keying can be avoided by use of the auxiliary duplication feature. (See Special Features.)

In an operation in which certain fields are to be duplicated from prepunched master cards, it is necessary toinsert each master card manually before duplicating
the first card of the group. Insert the master cards inthe card bed at the right of the reading station.
1. Turn off the automatic-feed switch before completing the punching of the last card of the preceedinggroup.

19

IBM 26 Printing Features

With the IBM 26 Printing Card Punch, characters canbe printed as they are punched. Each character prints
above the column punched (Figure 16), thus providing for full interpretation of the card. To permit thisprinting, turn on the print switch. Zero printing or suppression of printing in an individual column or field
is controlled by program-card coding.
With program control, zeros to the left of the firstsignificant digit in a numeric field are automaticallysuppressed, that is, 00025 is printed 25. This zero suppression is determined by the 12-punching in the program card to define the fields. For example, the program card for Figure 16 would be punched with 12
in columns 77 and 79, but blank in 76 and 78, to printmonth and day as shown.
Left Zero Print (2)To print zeros to the left in a field, as in Social Security
Number, punch a 2 in each column of the field in thej

OllOOBP F' JONESEMPLOYEENO.

D

t-r-- n~EPT. CLOCK

11

NAME

I] I] I]AX Dec.

Print Suppression (3)The print suppression feature provides an extremely
flexible control of printing. That is, even though theprint switch is on, printing can be prevented for one
or more columns of the card. Print suppression for acolumn is controlled by a 3 punched in the programcard. To suppress printing for a field, punch a 3 foreach column of the field. For example, the program
card for Figure 16 would be punched with 3's in columns 34-40.
~

07710116922 2 1
SOC. SEC. NO.

program card. For example, the .program card for
Figure 16 would be punched with 2's in columns 1-5
and 21-29. A zero in the units position of a field always
prints, unless all printing is suppressed.
Like zeros, the dash (-) and the ampersand (&)
are normally suppressed when they occur to the left ofa significant digit in a field; they can be forced toprint by the program 2 code.

RATES

CODE CODE

REG.

O. T

'DATE
HIRED
,- ~
MO. OAY Y.

nOl]nOOOOOOOOOIlOOOOOOI]OO'I]~OBOOnOnGO'OIlIl'OOIlOOOOOOOOOOOOOOOOOOOOOODDOODOODOOODO"DMOo
12345678; 10 II 12 1314 1516 17 1819 10 2122d242d 262728,~31~311~3;3 3ij383940 1424344454;4748(1505152535455565);85960616263"65666768697071727J7475~~~;'8D

1 ~ 1 1 11 1 1 111111 1 1 1 1 1 1 1 1 1 111 IlP 1 ill 1 1111111 1 111 1 1 1 1 11 1 1 11 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 11 1 11 1 1 1 1 1 1~ --- 222222221122222222 ~ 1l1]21]222:~~ 22222222222222222222222222222222222221]222

e; 33333333333333333 e.,g 3333 J 3 3: .5·~ 3333333333 PAYROLL MASTER 33333333333333

~'E
0..

44444444444444444_ _5555551111555555555

~:..E
_

r-r-

8:

44444441I::>
ct
44444444444444444444444444444444444444444
5555555:_; 555555555555555555555555555555555555555 D5

666666611661]66666666666~6~1]6666666~66~6666666666666666666666666666666666666666666

nn88881]8888888888888a888~8~88888888~88~n888888888888888888888888888888888888888888

7 7 7 7 71]7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 0:7 717 7 7 7 7 7 7 7 71 7 7: 7 1 7 7 7 77 7 7 7 1 7 17 7 7 7 7 7 77 7 7 7 77 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7S99999999999999999;999~9ru9n999999J99~999999999999999999999999999999999999999999"~3536a7'383940
iii

12345678 9101112131415111718192 21212l242~25M2829 031b23

Figure 16. Character Printing

2014243444541474845505152535' 555G 51585960 61&2B3646U687&16910 71 72737415 G17181

Special Features

These special features are available with the IDM 24
Card Punch or IDM 26 Printing Card Punch. In thevertical columns of Figure 17, the symbols X and'" indicate the maximum combinations of the special features in the various models of the 24 and 26.

case, with the auxiliary duplication feature, the master
information can readily be punched in the first detailcard of each group, by pressing the key once and without reference to a source document.
Alternate Program Feature

Auxiliary Duplication Feature

Auxiliary duplication is duplication from a master cardrather than from the card at the reading station. Punch
the information to be duplicated in a master card.
Fasten the card around an auxiliary drum. Insert thedrum in the machine on a spindle in back of the program drum.
An auxiliary duplicate key manually controls auxiliary duplication. Pressing this key starts auxiliary duplication, which continues to the end of the field asdefined by 12-punches in the program card. The information in the master card must be in the same columns
defined for duplication by the program card.
This type of duplication is advantageous when common information is required for certain cards but notfor others, when major-minor duplicating is performed,
or when prepunched master cards are inserted. In thecase of major-minor duplicating, the major data may
be dropped when the automatic-skip and duplicate
switch is turned off for a change of information in theminor field. When prepunched master cards are used,
any information common to all cards (such as date) is
dropped when a new master card is inserted. In either

An alternate program unit can be installed in themachine as a special feature so that two program setups can be punched in one program card. The coding
for the alternate program consists of 4-9 codes used in
the same manner as the 12-3 codes for the normal program. Both normal and alternate program codes are
summarized as follows:
NormalCode
12

Field Definition
Start Auto Skip
Start Auto Duplication
Alphabetic Shift
Left Zero Print
Print Suppression

11

o
1

2
3

Alternate
Code
4

5
6
7
8
9

This feature is especially advantageous when an
occasional card requires a different program control.
The card may be of a different design or may be apartially prepunched master. The transfer from thenormal program to the alternate program, for a complete card or for a part of a card, is controlled by theoperator by pressing an alternate program key.
To use the alternate program feature for a complete
card, this key may be pressed either before or after
Model Model Model 21
3 and 4 5 and 6 (26 only)

Modell and 2
Alphabetic Field Limit
Alphabetic Receive
Alternate Program
Auxiliary Duplication
Card Correction
Carer Insertion
Card Order - Converting
Clock Read-in
Post Card Stock Feed - fixed
Variable Length Feed
HiQh Speed Skip
Interspersed Gang Puncn
Large Reading Boord
Receive Control and/or Punch Switch Control
Self-Checking Number - Modulus 10
Self-Checking Number - Modulus II
Self-CheckTng Number Generator
Self-Checking Number Punch Elimination
Space Code Generation

Function

x
X x x

x

x x xxx x
x x xx x x x x x x
x x x

x x
x x x x

x x

x x
x x

x

x

x x

*x
x x

x
x
x x x x x x x x x x x x xxxx x * x xx x
x x x xx x*x xxx x x x x x x x x x x x x x x xxxx X x x x
X x
x
x
x x
x
x x xx x *

x
x

x

x
x x

x

X X

X

x x

x x
x x

*24 Only
NOTE: Switch control of Interspersed Gangpunch (special feature 4714) cannot be installed if
Self-Checking Number - Modulus 10 and Self-Checking Number Punch Elimination
are both installed.

Figure 17. Combinations of Special Features for the IBM 24/26

21

the card is registered, depending on the nonnal program coding in column 1. If column 1 of the normal
program is coded for manual punching, the key may
be pressed after the card is registered. If column 1 of
the normal program is coded for automatic skipping or
duplicating, however, this key must be pressed before
the card is registered. In this case, the automatic-feed
switch must be turned off before the preceding card iscompletely punched. Then pressing the alternate program key, after the preceding card is released, causes
transfer to the alternate program and card feeding.
If the first part of a card is punched under normal
program control and the remainder is punched underalternate program control, press this key when thealternate program is to be effective.
Pressing the alternate program key makes programming from the alternate program effective for theremainder of that card. When the following card feeds,
the normal program again becomes effective.
Do not duplicate program cards punched with bothnormal and alternate program codes.
Interspersed Gangpunch FeatureThis feature recognizes master cards with an upper
left or right comer cut. Detail cards must not have thesame corner cut as the master cards (and cannot have alower left cut). Punching is from master card to detailcard, or detail card to detail card, never from detail tomaster or master to master.
When the switch on the keyboard is off, the feature
is inoperative. When the switch is on, the feature determines whether a card is a master or a detail dependingon the presence or absence of the specified master
corner cut. Normal use of the feature requires thatthe automatic-feed and automatic-duplicating switch
be turned on.
Because the feature does not begin to operate until
after one card has fed from the feed hopper to thecard bed, the first card in the machine is considered adetail card. To feed the first card into position, press
the feed key twice as in standard feed operation, andthen press the release key once to position a card at
the reading station so that duplicating can begin.
Because the purpose of the feature is to suspend
punching for a corner-cut master card, programmingis the same for detail cards as in any nonnal card
punching operation.
Once duplicating has started, normal operation
under control of the program card continues until thefeature recognizes a master card. At this time the card
preceding the master is at the punching station. The
master card stays at the right of the card bed while the22

preceding card is duplicated. On the next card-feed
cycle, the master card passes the punching station atrelease speed, and all punching and programming issuspended. A master card requires approximately 1.25
seconds to pass to the reading station. If the next cardis also a master, the process is repeated. When a detailcard feeds, it is under normal control of the program
drum, and punching is duplicated from the preceding
card.
If required, an additional feature, controlled by atoggle switch, may be installed with the interspersed
gangpunch feature. This additional feature allows
manual selection of either upper left or right cornercut master cards in any interspersed gangpunch operation, but not both in the same operation. The switch
on the keyboard for the interspersed gangpunchingmust also be ON for this device to operate.
Card Correction Feature

The card correction procedure for operator-detected
keying errors can require considerable additional decision-making and keying by the operator. The IBM
card correction feature speeds the correction procedure for operator-detected keying errors on the IBM
24-26 Card Punch.
Upon detecting an error and before keying the next
column of information, the operator merely presses
the correction key on the keyboard. Essentially, thisaction moves the error card to the read station and reproduces the information (up to the error column)
into a new card at the punch station. The operator thenkeys in the correct information and resumes normal
operation.
When the correction (CORR) key is pressed (seeFigure 26), the actual sequence of automatic operation is:
1. An error code (12-11) is punched in the error column. Therefore, when the card correction featureis used, the 12-11 coding cannot be used to designate a special character, or a portion of any suchcharacter.
2. The error card is released at 80 columns per second
to the read station, and a new card registers at thepunch station.
Note: Any columns programmed for automatic
duplication are duplicated at 18 or 20 columns per
second during this release operation.
3. The information manually punched into the error
card is then automatically reproduced into the newcard (up to the error column) at the rate of 9 or
10 columns per second.
Note: Any columns programmed for automatic
duplication are duplicated at 18 or 20 columns permode with the card correction feature (Figure 18).
The 8-punch is still used to identify manual columns
for the standard programming mode. This meansthat left zero print is not available on any IBM 26 withboth the alternate programming feature and the cardcorrection feature.

second and any columns programmed for automatic
skip are skipped at 80 columns per second.
4. The new card stops in the error column for manual
keying of the correct information. Normal operation is then resumed.
PROGRAM CONTROLWith the card correction feature, each manuallypunched column must be identified by an 8-punchcode in the corresponding column of the program
card (Figure 18). This code identifies the columns
that must be searched for an error code during any
correction operation.
When an error-correction routine is in process, theoperator should not press or hold down any key on the
keyboard. This could affect the successful completionof the routine. In-process time covers the period between pressing the correction key and stopping the
new card at the error column.
The correction feature is not effective for the lastcolumn of a manual field that immediately precedes anautomatic function. This is because normal punchingof the last manual column permits the program control
to move into the automatic function area.
Never press the correction key immediately after an
automatic function is completed and before manual
keying. Should this occur, a continuous error-searchroutine would result. This improper use of the correction key places the error code in the last column of
the automatic field where the 24-26 cannot detect it.
To stop the continuous error-search routine, raise thestar wheels.
ALTERNATE PROGRAM

The 24-26 with alternate programming uses the 2punch to identify manual columns for the alternate

When the 24-26 is in the alternate program modeand the correction key is pressed, the machine continues in this mode until the entire new card is completed. This requires that all 80 columns of a program
card be fully programmed for both standard andalternate mode even though normal operation might
require less than 80 columns of alternate programming.
The additional columns of required alternate programming are an exact duplicate of the standard
programming for these columns.
All skip fields encountered during an error search
operation, while the machine is in the alternate mode,
are automatically duplicated to ensure an exact reproduction of the card.
SELF-CHECKING NUMBER, MODULUS 11

The 2-punch (rather than the 8-punch) is used todesignate each column to be error checked. Therefore, left zero print is not available on any IBM 26 machine with this feature.
PROGRAM CARD PUNCHING

A typical program card for the card correction featureusing standard and alternate programming could look
like Figure 18.
Note: The 1-, 3-, 6-, and 9-punches are not used inthis example. However, they could be used to program
their normal functions, if required.

111111111 1111 1111111111111111111111111 1111111 11111111111111111111 111111111
MANUALAUTO

MANUAL

DUP

AUTO

I

AUTO SKIP

MANUAL

DUP

00000000001000000000000000000000000000000100000000000000000000000000000000000000
1234581'8rotlnI3M151GI7DdM~D~NaanaH~~~~H~.n.~O~~~~~.UQa~MH~~ • • ~.Ha~fta"ft.v • • ~nnnNmMnnn.

1 11111111111111111 1111 11111111 111 1 111 1 111 111 111 1 111 11 1 1 11 1 1 11 1 11 1 11 11 111 11 11 1 1 11
la,a;:;f~~~111122222222222222222222222222111111112222222222222222222221111111111

333333333333333333333333333333333333333333333333333 33 3 3 3 3 3 3 3 3 33 3 3 3 33 3 33 3 3 3 3 3 33 3 34111111111111114111111111111IiII11 •• 1
555555555555 555}5 55 555 5 555555 55 5 5 55 5 5 5 5 55 5 5 5 5 5 5 5 515 5 5 5 55 5 5 5 555 5 5 5 55 5 5 5 55 5 5 55 5 5 5 56666866666666666666666666666i666666666666666666666666666666666666666666666666666
77777777777777711111111111111~lllllI1111~77777777ll~l.11111111111111117777777777

1111111111188888/11111111111111111111111111 888888888888888888888888888881111111111
99 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9

MANUAL

AUTO SKIP

1- Standard Program[j-Alternate Program

MANUAL

AUTO SKIP

MANUAL

Figure 18. Program Card for Card Correction Feature

23

Standard Program

Alternate Program

12-Field Definition
ll-Automatic Skip
O-Automatic Duplication
8-Manual Field: The 8punch must appear ineach column of all manual fields programmed
for standard mode. This
punch should not be usedin any field programmed
for automatic duplication
because this would force
half-speed duplication ofthis field during errorcorrection routines.

4-Field Definition
5-Automatic Skip
2-Manual Field: The 2punch must appear ineach column of all manual fields programmed foralternate mode. This
punch should not be usedin any field programmed
for automatic duplication
because this would force
half-speed duplication ofthis field during errorcorrection routines.

Card Insertion Feature

The card insertion feature simplifies the manual insertion of a master duplicating card in front of a groupof cards to be punched, or the insertion of a blank or
prepunched trailer card at the end of a group of
punched cards.
To insert a new master card in front of a group:
1. Set the card insertion feature switch to INSERT.
2. While punching the card preceding the master card
to be inserted, press the MC (master card) key.
When the card being punched is completed, it isreleased through the reading station, but stops
before it is stacked. There is no card at the reading
station and the next card is registered for punching.
3. Manually insert the new master card in the reading
station.
4. Press the feed key to register both the master card
at the reading station and the next detail card at thepunching station.
5. Resume normal operation. Any fields programmed
for duplication are duplicated from the new mastercard.
To insert a new master card (or trailer card) behinda group of cards that have been punched:
1. Set the switch to STACK.
2. While punching the card preceding the master,press the MC key. When the card being punched iscompleted, it is released through the reading stationand stacked. There is no card at the reading station.
The next card is registered at the punching station
ready to be punched.
3. Manually insert the master (trailer) card behind thecards in the stacker.
4. Resume normal operation.

Note: The card insertion feature can be installed onany 24 or 26 with the card correction feature. How24

ever, once the MC key is pressed, the correction key
cannot be used until the master card function is completed.

Self-Checking Number FeatureThis feature is described in IBM 24, 26 Card Punch
Bulletin Self-Checking Number Feature, Form G241057.

High-Speed Skip Feature

The high-speed skip feature provides the greatest advantage for those applications that require skippingof 55 or more consecutive columns of the card. It isavailable for factory or field installation on the 24 or 26.
This is a program-controlled high-speed skip operating with standard skipping. High-speed skipping isaccomplished at the rate of approximately three times
the standard skip speed and results in a saving of eight
milliseconds per column skipped at high speed. In theexample (Figure 19) if 66 columns are skipped, 62
columns are skipped at high speed with a saving ofa half-second per card. The sensing mechanism ispositioned in such a way that five columns at the endof the field have to be reserved for drop-out. The controlling 9 not punched in the last five columns of the
program card disengages (drops out) the high-speed
skip and slows down the skip for the remainder of thecard. This is necessary because the high skipping
speed must be slowed down to obtain proper registration of the card for punching.
When this feature is installed on machines with thevariable-length card feed feature, card output is also
increased. The missing portion of these cards, forexample, columns 51-76, or 60-76, are skipped at highspeed. The last four columns are skipped at a slower
speed.
When this feature is used with alternate programming, programmed print suppression is eliminated.
OPERATION

To use the high-speed skip feature, an 11-punch initiates the skip, the 9-punches control high-speed skipping, and the 12-punches define the remainder of the
field. For high-speed skipping, punch the program
card with:• an 11 and a 9 in the first column of the high-speed
skip field• nines in all the other columns of the high-speed
skip field, except the last five columns• twelves in all the columns of the high-speed skip
field, except the first column.

UUDD 0000000 DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDODDDDDDDDDDDDDDDOODOO
D
00000000000000 00000000000000000000000000000000000000000000000000000000000000000
12345671tro',12Ql
MU1"9mnU~MZ5nu~.~nn~z.u •• ~~~u~u.u.g.~~~~"~~9~~~UU"fiH~AnWllnnM~Mnnn~
11111111111111 11111111111111111111111111111111111111111111111111111111111111111

222222222222222 2222222222222222222222222222222222222222222222222222222222222222
333!333333333333 33333333333333333333333333333!333333!3!3333!3333333333333333333
44444444444444444

4444444444444444444444444444444444444444444444444444444444444

55555555555555555555555555555555555555555555555555555555555

High-Speed Skip
11111111111117777177171111177771177177177117771111711111177717711771711111111111
88888888888888888888888888888888888888888888888888888888888888888888888888888888

99999999999999DOOODDODDDDDDODDODODDDDODDDDDUDDDDDDDDDDDDDOODOOODDDDDDOOODD099999

t234561'.'DII1213"'5161JI819m2IunM~~nDH~3IU~M~.nUft.~ua~~.G4G~51~~M~~»~~.~UU"~~~UUn7Inn~HHnnnM'1M

Figure 19. Program Card Showing High-Speed Skip Punching

On machines equipped with the alternate program
feature, 9-punches become the non-alternate or normal
program, and the 3-punch is used to control the alternate-program high-speed skip.
This feature requires the operator to press the feed
key three times to register the first card from the hopper at the punch station. The second card is at thepreregistration station; a third card, hidden from sight,
has just left the hopper. If at any time during the operation it is necessary to turn the auto-feed switch off toclear the machine of cards, press the release andregister keys three times to remove the cards from thepunching and reading stations. Also, remove manually
the last card, which was hidden, from the preregistration station after the second release.
This feature prevents backspacing the last 16 columns of the card, because the backspaced card pushes
against the following card and interferes with registration.

Postcard Stock Feed FeatureThis special feature facilitates the use of postcard stockin the IBM 24/26. The feature can be for postcard
stock only (0.009 inch thick) or can be interchangeable
to accept standard (0.007 inch thick) and postcard
stock.
To be mailed at minimum rates, - card size mustsatisfy U. S. post~l regulations:
Maximum-3~6 inches X 5~6 inches

Minimum-23M inches X 4 inches

To be processed in IBM equipment, they must be ofstandard punched-card dimensions and O.009-inch

thick (plus or minus 0.0005 inch). Other factors to beconsidered in designing cards for postal use include
location of punching, scoring, content, and corner cut.
N ate: Approval must be secured from local postal
authorities for specific card designs.

Alphabetic Field-Limit Feature

The alphabetic field-limit feature defines the limits ofa programmed alphabetic field to prevent accidental
punching beyond that field.
A 2-punch in the program card controls this feature. This program card is coded in the normal manner
for alphabetic punching: a I-punch in each column
and a 12-punch in all but the first column. Punch the
2-punch in the next to the last column of the limited
field.
Machine operation is normal until this column isreached. As the last column of the limited field ispunched, the keyboard locks, thus indicating to theoperator that the allotted columns for that field havebeen completely filled. To continue operation, press
the release key. If the card must be repunched to abbreviate or to condense the alphabetic information
within the limits of a field, press the release key again
to release the card from the punching station. If thealphabetic field-limit code column is passed by duplicating, skipping, or releasing, the feature is inoperative.
The duplication key is inoperative in the next-to-lastand the last column of an alphabetic field programmed
for field limit. On the 26, if the programmed, limitedalphabetic field is also programmed for print suppression, printing is not suppressed in the last column
25

of the field unless it is followed by another alphabetic
field. The use of the left zero print feature is not compatible within an alphabetic field. Pressing the numerical shift key when punching the next-to-last -column
makes the feature inoperative.
Note: On reM 26 Card Punches equipped with alternate program feature, when program codes 2· and 8 are used for thecontrol of Alphabetic Field Limit feature, the left zero print
control feature is not available.

Variable-Length Card Feed Feature

The variable-length card feed feature on the 24 or 26
allows the processing of 51-, 60-, 66-, and SO-column
cards (Figure 20). Special features that apply to the
24 or 26 can be used with this feature.
MACHINE SETTINGS

The operator can easily make all settings to change
card lengths. Only one length of cards may be processed at one time. For each- length of card there is acard guide which is raised on the hopper bed to forma right-hand guide. The operator performs these preliminary steps to process each length of card.
1. Select the proper card guide in the hopper and lift
it forward into position. For' any selected card
length, all card guides for cards of shorter lengthmust rest in the hopper bed (Figure 21). Note that
the SO-column card guide is fixed at the right sideof the hopper. The sliding pressure plate in thehopper is notched to pass over the raised cardguides.
2. Lift the thumb latch and move the card pusher tothe proper card-column notch (see Figure 20). A
spring guides each card under the card pusher forcorrect feeding position.
3. Align 51- and 60-column cards to the stacker drumby pulling the stacker stop operating lever toward
the front of the machine (see Figure 20). For 66and SO-column cards, push the lever back.

Figure 20. Variable-Length Card Feed Device

26

4. The following settings are necessary whether or
not a program drum is used. To set program cam
extension knobs, lift the program drum cover forward, tum the program control lever to raise theprogram drum starwheels, and lift the drum off its
shaft (Figure 22). Space to column 16 on the column indicator and tum off the main line switch.

Caution: These program cam extension knobs areinterlocked and will bind if moved in any sequence
but the one given here. To adjust the knobs, lift
them out of their countersunk recesses and move inthis sequence:a. To change to a longer card, move each knob in
ascending numeric sequence to the countersunk
recess at the left end of each slot. For example,
to change from 51-column cards to SO-column
cards, first move the 51-column knob, then the
60-column knob, and then the 66-column knob.
b. To change to a shorter card, move each knob indescending numeric sequence to the countersunk
recess at the right end of each slot. For example,
to change from SO-column cards to 51-column
cards, first move the 66-column knob to the right,
then the 60-column knob, and then the 51-columnknob.
These steps are summarized on a decal inside the program drum cover.

OPERATION

Program cards must only be punched, starting at column 1, with the same number of columns that are in
the cards to be processed. However, if the machine isequipped with a high-speed skip feature, high-speed
skip can be programmed beyond the number of col-punches with a numeric keyboard punch (and print)
the characters corresponding to 12 and 11 coding only.
Other special characters require use of the multiple
punch control key. All 11 special characters can bepunched (and printed) when duplicating on the IBM
24 and 26. Machines with an alphabetic keyboard,
punch (and print) all 11 special characters whenpunching or duplicating.

ao-Column Guide(Fixed)Figure 21. Hopper Card Guides

umns in the cards being processed to obtain the maximum benefits of this feature. Otherwise, program card
preparation is the same as for 80-column cards.
Any length card can be manually inserted if thecard pusher is positioned for that length. The rightend of each card must rest against the card pusher.
Do not backspace within the last 16 columns of allcards, because the backspace card would push against
the following card and interfere with registration.

Special-Character Arrangements

The arrangements in Figure 23 are available for thepunching (and printing) of special characters. Card

IBM Card CodeArrangement

1212-3-812-4-8

II

A

&

-

B

/

C

&

·
·

Il

0
E

-

F
G

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FIgure 22. Program Cam Extension Knobs(80-Column Card Setting)

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Figure 23. IBM 24, 26-Special-Character Punching and Printing Arrangements

27

Program Card Preparation

When a program card is to be prepared for a particularpunching application, the card design should be carefully analyzed to code the program card for maximum
punching efficiency. Proper use of the various featuresof the card punch reduces operator time and effort toa minimum.
IBM 24, Normal Program

If an IBM 24 Card Punch with no special features isused, the cards should be analyzed for:1. field-definition coding, which determines the lengthof each field. Punch a field-definition 12 in eachcolumn except the first (left-hand) of every field
regardless of the type of operation to be performedin that field. The 12's are used in skipped or duplicated fields to carry the skip or duplication acrossthe field, once it is started. They are used in fields
programmed for manual punching to make full useof the feature provided for the correction of errors
made while punching. With the fields defined as tolength, each correct field can be duplicated by asingle pressing of the duplicate key, and only thefield containing the error must be re-keyed.
Occasionally it is necessary to split a field by
eliminating the 12-punching in one or more columns. When an X is to be punched (keyed or duplicated) in a numeric field, but skipping must notoccur, eliminating this 12 prevents the skipping of
the rest of the field (see X-Punching and Skipping
under Operating Suggestions).
2. automatic skipping for each field that is not to bepunched at this time. If several successive fields areto be skipped on every card, program them as one
large field with the X in the first column and 12'sin all successive columns.
3. automatic duplication of each field that is punchedwith the same data for a group of cards. If several
successive fields are to be duplicated on every card,
program them as one large field with the 0 in thefirst column and 12's in all successive columns.
4. alphabetic coding to shift the keyboard when letters
are to be keyed. If all, or most, of a field is to bealphabetically punched, code it with 1's and use
the numeric shift key for occasional figure punching. In the duplication of alphabetic punching, the1's permit duplication of blank columns and prevent
skipping caused by the X's in the letters J through R.
28

After the program is planned for these operations,punch the codes directly into a single card to serve as
the program card. It is desirable to prepare the program card in a card of the same design as those to bepunched. When punching the program card, punch
all codes across the card from column 1 through column 80 without backspacing, to maintain accurate
registration. When two codes are to be punched in
one column, use the proper letter or special characterkey on the combination keyboard (A for a 12-code
and a I-code, or the / symbol for a O-code and a 1code).
Printing Features

If the IDM 26 Printing Card Punch is used, the cards
should be analyzed for zero printing and print suppression in addition to the basic functions discussed
in the preceding paragraphs.
1. Zeros, dashes, and ampersands to the left of a significant digit in a field are automatically suppressed.
This suppression depends on the field-definition
coding of 12's in every column except the first.
Therefore, if several successive fields are to be programmed for automatic duplication but zero suppression is desired, program each field independently for automatic duplication, rather than as one
large field as described before.
Note: A zero always prints in the units positionof a field that does not have a significant digit (fieldwith all zeros) unless the units position is programmed for print suppression.
If zeros (dashes or ampersands) are desired to
the left in a field, such as social security number,they must be forced by punching the program cardwith code 2 in each column in which such printing is to occur.
2. To suppress all printing in a column or columns,
punch a 3 in each column of the program card.
Alternate Program

If the alternate program is used to handle two types ofcards in one punching operation, analyze all the preceding functions for the alternate program, and punch
the proper codes (4-9). Consider the time in the card
cycle when the change to the alternate program is to
be made. The change can be made at the beginningof the card or whenever in the card cycle it is desirable
for the alternate coding to become effective. Once thealternate program key is pressed, the alternate program codes are read for the rest of the card; it is notpossible to return to the normal program in the samecard cycle. However, when the next card is fed, thenormal program coding automatically becomes effective. If the whole card is to be controlled by the alternate program codes, code the first column of the normal program for manual operation to give the operator
time to press the alternate program key without interrupting automatic feeding.
Multiple Functions
When printing or alternate program functions are usedin addition to the basic program functions, the program card may require several codes in a column(Figure 24). In this case, punch a master deck of cards
for the preparation of the program card. This deck
consists of a maximum of 12 cards, one for each punching row: one card punched with all the required 12codes, a second card with all the required ll-codes,
a third card with all the required O-codes, and soon. After the cards of the master deck are punched,
duplicate each card, one at a time, into a single
card which then becomes the program card. Thismethod of preparing a program card facilitates the
preparation of slightly changed or duplicate program cards, because multiple punches other thanstandard may not be duplicated on the punch.
Program Planning Card
A program planning card, X24-8605, is an aid in the
preparation of program cards. This card has 12 rowsof column numbers, each row located in a punchingposition (Figure 25). The program codes, with thefunction of each, are on the back of the card for reference, and a place is provided for any special notes
pertinent to the individual program-card design.
When analyzing the cards to be punched, mark theplanning card for the functions to be performed ineach column. For example, if column 10 is to bepunched with an alphabetic character under normal
program control, draw a mark through column 10 in
the I-row; if columns 59-80 are to be automaticallyskipped under normal program control, draw a markthrough column 59 in the ll-row and columns 60-80
in the 12-row. Punch the program card, or the individual cards of the master deck, by reference to theplanning card. After the program card is punched,check it by laying it over the planning card. The markings on the planning card should be visible through thepunches in the program card.
This chart illustrates the program card coding necessary to perform card-punching operations in normal
or alternate program control.
Operation

Punch Numeric
Punch Alphabetic
Duplicate Numeric
Duplicate Alphabetic
Skip Automatically
Left Zero Print
Suppress Printing

Normal Code·Alternate CodeFirst Rest ofcolumn fieldFirst
R.est ofcolumn field

space
1
0
0+1

space
7
6
6+7
5
8
9

X

12
A
12
A
12

2
3

C

B

4
7+4
4
7+4
4
8+4
9+4

ED
DEDUCTlDNS

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MD. DAY fl.

30 31 3233,3435 313lJl3l40 414

31"4541 1481115"1515':;: :; .MD. DAY YR. DIP!. CLOCK

INS. HOSP.

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o0 0,0 0'0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 000'00,00 0 0 000 0 0 0,0 ODD o,D 01000 10 °010 0 000 0 0 0 000 0 0 0 0 0 0 Doli 0 0 0 0
1
1
1 2 3 14 5 Is 1 8 9 lD 11 12 1314 15 11171. 19 20 212223 242521272

f:'555S 5158591D61&2I3I4ISSUlII U 11111 12131415711171l1IG

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oDIlI DIII DDDI2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 22122122
22 222 DD212 2 2 2 212 2:2 2 212 2 212 2 222 2 2 Payroll Master 22 222 !!!
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and
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333:33'33333333333333333333333333:33:333333333 DIDD 33:33:3331333 13333333 Deduction Card 33333 E
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4DDllD~DDD4DDDDDDDDDDDIlIlIlDIlD4DDDIDDIDD4D4D04 4100 1l011l~01l1l11l Iltll 400001l01l01141l1l111l1l41l4DIlD ~
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5 515 5,5 5 5 5 5 5 5 5 5 5 555 5 5 5 5 555 5 5 II 5 5 515 515 5 5 5 5 5 5 5 51]15555 515 515 5 515 5 515 5 5 5 5 5 5 5 5 5 5 5 5 555 5 5 5 5 5 5 5 5 ~
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6 6 6:6 6,6 6 6 6 66 &6 6 6 &6 666 6 6 6 6 6 6 6 6 6 616 616 6 D6066 6 6 616 6 &6 616 616 6 616 6 616 6 6 6 & 6 & & 6 & 6 & & & & & 6 & 6 & & & & B -c
111111:1111

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777,77:7777

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EMPLOYEE MAME

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717777717717771777117

IIP\II

888.88:88 B88 8 8 8 8 8 8 g 8 8 8 8 8 8 8 na 088.,88,888 . 88

l~:i -

MISC. DEDUCTION CARD -1818881881881881818818188~D~ED~UC~TIO~.~N~A~lIfW:"~·.~='=r~·~/t'fl~~i'J"f/9 9 9,9 9;9 9 9 919 9 CJ 9 9 9 999 9 9 9 9 9 9 9 9 t 9 9!9 9:9 9:9 9 9 919 9 9 9 919:9 999 9:9 9:9 9 9il 919;9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9999999 9 91
123"

IBM

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Figure 24. Program Card-Multiple Functions

29

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CARD OR JOBIDENTIFICATION:

PROGRAM PLANNING
12

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II0

1 2 3 4 5 • 7 8 • 10 1112131415 .171118 2:1212223242521 8 2128.31.3334353137313141414243444541.41_ 515253 0 555857515110 81128314658817181170 n 7273747576777171 ..

0112345171111'ISSI'

121283131323334353137312841~4243444541U41415151H531951~5I5IUI1I2I314nn~nunnnn14Hn77nn80

1

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6

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891234587'.1011121314I5I117I11828212223242S2192128303132333435313738284D~4243444541U41415051H539951~5151I011I2I3D4I5"~UU7Onnn14HlD77lDnlO

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Figure 25. Program Planning Card

Program Example

The functions marked on the card in Figure 25 constitute the program plan for the payroll-master-anddeduction card in Figure 24. The field headings forthe payroll-master part of the card are at the top of
the card; the headings for the deduction part are between the 7 and 8 punching rows. A payroll mastercard is prepared for each new employee and is punchedunder normal program coding. Miscellaneous deduc-30

tion cards are punched for only those new employees
who have deductions other than the fixed deductions,and are punched under alternate program coding.
Whenever possible, common information is duplicatedfrom the payroll master cards into the deduction cards.
The cards are punched in groups by date hired, andthe rate-change date for a new employee is the sameas the date hired. The program card is planned andpunched as shown in Figure 26.

Columns

Field Heading

1-9

Social Security No.

Manual punch; print zeros
to the left

Automatic skip

10-27

Emp loyee Name

Manual punch, alphabetic

Automatic duplicate,alphabetic

28

Sex

Manua I punch

29

Tax Class

Manua I punch

30-35

Date Hired

Automatic duplicate

36-40

Emp loyee Number

Manua I punch (Dept. andC lock coded as separate
fields for error correction
and zero suppression)

Automatic duplicate(Dept. and C lock coded
as separate fields for zero
suppressi on)

41-42

Occup. Code or
Ded. CodeManual punch; printzeros to the left

Manual punch; printzeros to the left

43-46

Base Rate

Manual punch, suppress
printing

47-52

Rate Change Date

Automatic duplicate

53-58

Fixed Deductions

Manual punch (Insuranceand Hospitalization coded
as separate fields for error
correction and zero suppression)

59-68

Deduction Name

69-74

Misc. Ded. Amt.

75-80

Effective Date

Norma I Program}

Automatic skip

Alternate Programt

Automatic skip

Automatic skip

Manual punch,alphabetic
Manua I punch
Manual punchMonth and day in each date field are coded as separate fields for zero suppression
Figure 26. Table for Program Example

31

Operating Suggestions

These suggestions are given as an aid to most efficient
operation of the IBM 24 and 26 Card Punches.

necessity of re-keying the master information. The
automatic feed switch should be off when the cards
are released.

Starting a Punching Operation

When a new job is started, the release key should bepressed (but need not be held) after the main-line
switch is turned on. After a short delay, a release cycle
occurs, indicating that operation can be started. Then,press the feed key twice to register the first card if
the automatic feed switch is off. If the switch is onpress the feed key only once. If a prepunched maste;card is to be inserted, place it in the center of the card
bed after the first feed cycle.
When master information for automatic duplication
is to be keyed in the first card of the group, turn off
the automatic skip and duplicate switch before thefirst card is registered, and leave it OFF until the master
information is keyed. On this first card, use the skip
key to skip the fields programmed for automatic skipping.

Clearing the Card Bed

When the card bed is to be completely cleared at theend of a punching operation without feeding more
cards from the hopper, turn off the automatic feed
switch during the punching of the next-to-Iast card.
The last card is then registered for punching by pressing the register key. After the last card is punched andmoved to the center of the card bed, it is moved on to
the stacker by pressing the register key, the releasekey, and then the register key again.
If the automatic feed switch is turned off after thelast card to be punched is completed, press the release
and register keys alternately three times. In this case,two blank cards stack behind the last punched cardin the stacker.
Removing a Card from the Center of the Card Bed

Engaging the Program Reading Mechanism

Turning the program control lever to lower the starwheels may not fully engage the reading mechanism.
Therefore, it is necessary also to press the release key.
For this reason, once the program is turned on leave
it ON, and whenever possible any temporary changes
or interruptions in the punching routine should be
handled by the functional switches and keys.
Stopping a Punching Operation

When an operation is to be stopped and the main-line
switch is to be turned off before a batch of work iscompleted (as at a lunch hour), the card at the punching station should first be completely punched andreleased. Before the card is released, however, turnoff the automatic feed switch. This permits restarting
the job without additional card handling.
When one batch of work is to be followed by another batch using the same master information andprogram control, a blank card should follow the lastcard of the batch through the punching station. The
blank card can be released past the punching station
as the last card is released past the reading station.
This causes the blank card to be automatically punchedwith the master information for duplication into thefirst card of the next batch, and thus eliminates the32

To remove a card from the center of the card bed without affecting the following cards, manually move it
into the reading ~tation and press the release key. This
moves it to the left of the card bed where is can belifted out.
Removing a Card from the Left of the Card Bed

When a card has been released from the reading station but not stacked, it is in the left of the card bed.
For easy manual removal, move the card to the extreme left by pressing down on the arm that extends
from the reading station.
Removing a Card from the Punching or Reading
StationIf for any reason a card must be removed manuallyfrom the punching or reading station, hold down thepressure roll release lever while pulling out the card.
If a card at the punching station does not move easily,press all the numeric keys. Then, while holding down
the lever, pull out the card without tearing it.
Spacing over Columns

Without program control, the duplicate key may be
used to space over columns, if the same columns areunpunched in the preceding card or if there is nocard immediately ahead. This operation is faster thanusing the space bar.
Multiple-Punched Columns

Punch two or more digits in one column by holding
down the multiple-punch key while punching the digit
keys one at a time. If the machine is not equippedwith a multiple-punch key, hold down the space bar
for this operation. The keyboard is automaticallyshifted to numeric position when the multiple punch
key or the space bar is pressed.
On the IBM 26 Printing Card Punch, do not duplicate multiple-punched columns other than standard
alphabetic or special character punching. The IBM 24
Card Punch can duplicate any combination of two,
three, or four punches.
X-Punching and Skipping

The punching of an X in a numeric field normallycauses skipping, but in an alphabetic field it does not.
If a control X (such as a credit X or a date X) is to bepunched in a numeric field but skipping must notoccur, consider these factors:
1. If the X is punched (keyed or duplicated) alone ina column, skipping to the beginning of the next fieldoccurs. This skipping can be prevented by coding
the single column of the field with a 1 in the program card (on an alphabetic machine) or by eliminating the program 12-code in the column following the X-punching. In the first method, if a figure
instead of the X is keyed, hold down the numericshift key. In the second method, punch the program
card with a 0 in the following column if automatic
duplication is performed; or press the duplicate key
a second time, or hold it down over the blank column, if manual duplication is performed.
2. If a control X is to be keyed over a digit, press themultiple-punch key to key the two digits in one
column. (On machines not equipped with the multiple-punch key, use the space bar.) This prevents
the X-skipping and no provision need be made in
the program card.
3. If the control X and a digit are duplicated, skippingto the end of the field occurs. This can be prevented
by coding the column with a 1 in the program ·card(on an alphabetic machine) or by eliminating the
program 12-code in the following column. In thefirst method, if the column is keyed at any timepress the multiple-punch key (or space bar). This
shifts the keyboard into numeric position and prevents skipping. In the second method, punch theprogram card with a 0 in the following column if
automatic duplication is being performed; or press

the duplicate key a second lime, or hold it downover the blank column, if manual duplication is
being performed.
Corner Cuts

Cards can have a normal upper left or upper rightcorner cut. A special corner cut (C3) must be used
when designing a card with a lower left or lower rightcorner cut. This should be kept in mind especiallywhen designing tumble cards, because an upper corner
cut becomes a lower cut when the card is tumbled.
Single-Card Feeding

When the cards are to be fed manually, one at a time,
place them directly in the card bed, to the right forpunching or in the center for reading. Do not insert
single cards in the card hopper. When placing a cardin the center of the card bed, position it so that thecolumn-l edge is between the feed rolls at the rightof the reading station. If the card is pushed in too far,
improper feeding and duplicating may result.
Keyboard Locking

The keyboard locks under any of these conditions:
1. The main-line switch is turned off and then on while
a card is registered at the punching station. Press
the release key to unlock the keyboard.
2. On the combination keyboard, an alphabetic key ispressed in a field programmed for numeric punching. Unlock the keyboard by pressing the backspacekey (then space to the next colurqn), the releasekey (the card is released without punching), or
the alphabetic shift key (the letter is punched).
3. A blank column is duplicated in a field programmed
for numeric punching. This serves as a blank-column detection device to ensure that a digit ispunched in every column of a numeric field that isbeing duplicated. Unlock the keyboard by pressing
the backspace key or the alphabetic shift key on
the combination keyboard.
4. A card is not registered at the punching station.
This feature makes it impossible to do any punching or spacing unless a card is in position to bepunched. To move a card into punching position,press the register feed, or release (with the automatic feed switch ON) key.
5. The register key or the feed key is pressed when acard is registered -at the punching station. Press therelease key to unlock the keyboard.
Suspending Automatic Duplication on First Card

Master information in the first card of each new groupmust be keyed. Automatic duplication must, therefore,be suspended for that card by turning off the auto33

maticskip and duplicate switch. Because this requires
the manual setting of the automatic skip-duplicate
switch each time master information changes, consideration should be giv.en to proper card design as an
aid to most efficient operation.
Here are several recommended procedures forpunching the first card of each group. The procedures
vary depending on conditions brought about by differencesin card design.
1. Whenever possible, program the first field in a cardfor manual operation. This gives the operator achance to turn the automatic skip-duplicate switch
off before starting to punch the first card of a newgroup.
a. When the first card of a new group is registeredat column 1, turn the automatic skip-duplicate
switch off.
b. I\eyPunch the complete card.
c. When, the second card of the group is registeredat column 1, turn the automatic skip-duplicate
switch on. (The switch could have been turned
on after the master information was keypunched).
2. Automatic duplication should not immediately fol'Iowan automatic skip. Design a manually operated
field between the two automatic operations if pos,. sible.
a. Keypunch the first fidd.
b. Automatically skip the second field (automatic
skip-duplicate switch on).
c. Turn off the automatic skip-duplicate switch.
Keypunch the third field.
d. Keypunch the fourth field. Turn on the automatic skip-duplicate switch.
3. Sometimes other factors in the use of the cards
make it necessary for automatic duplication to folIowan automatic skip. In such a case, study thepossible procedures and follow the best one. Twoprocedures are outlined here.

[-Jong-Skip Fielda. Keypunch the first field.
b. Automatically skip the second field. During theskip, turn off the automatic skip-duplicate switch
to prevent automatic duplication in the following field. This can be done if the skip is fairly
long.
c. Keypunch the third field and turn on the automatic skip-duplicate switch.

34

Short-Skip Fielda. Turn off the automatic skip-duplicate switch
when the card is registered at column 1.
b, Keypunch the first field.
c. Skip the second field by use of the skip key.
d. Keypunch the third field and turn on the automatic skip-duplicate switch.
4. When automatic duplication is immediately followed by an automatic skip, the first card ispunched as outlined here:a. Turn off the automatic skip-duplicate switch
when the card is registered at column 1.
b. Keypunch the first field.
c. Keypunch the second field. Either during, or at
the end of, this field, turn on the automatic skipduplicate switch, so that the following field canbe automatically skipped.
d. Automatically skip the third field.
5. If an automatic skip must come first in a card immediately followed by automatic duplication, theprocedure for handling the punching is similar tothat outlined in number 3 and is described here:

Long-Skip Fielda. Automatically skip the first field. During the skip,
turn off the automatic skip-duplicate switch toprevent automatic duplication in the second
field. This can be done if the skip is fairly long.
b. Keypunch the second field and turn on theautomatic skip-duplicate switch.
c. Keypunch the third field.
Sholt-Skip Field<l. Turn off the automatic skip-duplicate switch before the last card of a group is punched in column 80.
h, Press the skip key to skip the first field of thefirst card of the following group.
c. Keypunch the second field and turn on the automatic skip-duplicate switch.
d. Keypunch the third field.
6. When an automatic skip field comes between two
fields programmed for automatic duplication, thefirst card is punched as outlined here:a. Turn off the automatic skip-duplicate switch
when the card is registered at column 1.
b. Keypunch the first and second fields.
c. Skip the third field by use of the skip key.
d. Keypunch the fourth field and turn on the automatic skip-duplicate switch.

Ribbon Replacement

The ribbon on the IBM 26 Printing Card Punch feeds
between two spools, through ribbon guides, and under
the punch die (Figure 27). The old ribbon is removed
and a new one is inserted as follows:
1. Turn off the main-line switch.
2. Remove the ribbon-spool retaining clamp.
3. Cut or break the old ribbon.
4. Remove both spools from their spindles and pullout the two pieces of ribbon. Empty one of thespools.
5. Place the spool of new ribbon on the right-handspindle, positioning it so that the ribbon feeds
from the top of the spool toward the front of themachine. Lift the right end of the ribbon-reversing
arm, if it is not already up, and unroll about a footand a half of ribbon; then push down the rightend of the ribbon-reversing arm to hold the spool
steady.
6. Feed the metal leading-end of the ribbon between
the punch die and the card bed, sliding it throughthe groove in the center of the card bed (between

the 3 and 4 punching position). The groove permits the extra thickness of the metal end and thereversing eyelet to pass between the punch die
and the card bed. Be sure to keep the ribbon
straight, with the top side up at all times.
7. Hook the metal leading-end of the ribbon in theslot in the center of the empty spool and wind the
ribbon onto the spool until the reversing eyelet ison the spool.
8. Place the spool on the left spindle, positioning it
so that the ribbon feeds onto the spool over the
top. Be sure that the ribbon is not twisted and thatthe top side of the ribbon is still up.
9. Hook the ribbon around the right and left wireribbon guides, and slide it through the right andleft ends of the reversing arm and over the rollers
in front of the ribbon spools.
10. Slide the ribbon up under the punch die so that it
is in the upper groove provided for it in cardprinting position (above the 12-punching position), and take up the slack.
11. Replace the ribbon-spool retaining clamp.

Figure 27. Ribbon Replacement

35

Combination Keyboard Summary

On the keyboard chart (Figure 28) each key is numbered for purposes of description in the following
summary.

On the combination keyboard, keys 40-43 punch
multiple digits for eight special characters. They canbe pressed when the keyboard is in either numeric oralphabetic shift to punch these characters;

Punching Keys

Key

Keys 1-18 can be pressed only when the keyboard is inalphabetic shift to punch the letters indicated. If oneof these keys is pressed while the keyboard is in numeric shift, the machine locks. To resume operation
release the card, or press the alphabetic shift key,which causes the letter to be punched.

40
41
42
43

Combination keys 19-29 can be pressed when the
keyboard is in either numeric or alphabetic shift topunch these characters:
Key

Numerical ShiftAlphabetic ShiftAlphabetic Shift@ (4,8)% (0,4,8)" (11,4,8)0(12,4,8)

Space BarThe space bar can be pressed at any time in a manual
field to cause ~pacing over one column of the card. If
a machine is not equipped with a multiple-punch key,hold down the space bar to permit multiple punchingin the same column.

19& (12)p20

0/ (0,1)

21

1

U

22

2

I

23

3

0

24

4

J

25

5

K

26

6

L

27

7

M

31. ALPH (ALPHABETIC SHIFT)

28

8

8

29

9

9

This shifts the combination keyboard into alphabetic
position as long as it is held down. It is normally used

Functional Keys

30. NUM (NUMERIC SHIFT)
This shifts the combination keyboard into numeric
position as long as it is held down. It is normallyused to permit the punching of numbers in an otherwise alphabetic field.

SPACE

Figure 28. Combination Keyboard Chart

36

Numerical Shift# (3,8), (0,3,8)$ (11,3,8)• (12,3,8)

BAR

to permit the punching of letters in an otherwise
numeric field. When duplication is being performed,
this key permits automatic spacing over blank columns
and prevents skipping caused by X-punching.
32. DUP (DUPLICATE)

This key causes punching by reading from the preceding card.
1,Vith Program Control. Pressing this key once causes
duplication of the field for which it is pressed, atthe rate of 20 columns per second.
Without Program Control. Causes duplication only as
long as the key is held down, at the rate of 10 columns per second.

33. -SKIP (OR)-SKIP in Numeric Shift. Punches an 11 (-) and causes

skipping of the field for which it is pressed.
-'-in Alphabetic Shift. Punches an 11 (-).

34. REL (RELEASE)
Causes the cards at the punching and reading stations
to be advanced completely past those stations. Fields
programmed for automatic duplication beyond thepoint of release are punched in the card before releaseis completed.

35. FEED (CARD FEED)This key causes a card-feed cycle:
1. Feeds a card from the hopper.
2. Registers the cards at the punching and reading
stations.
3. Stacks the card from the left of the card bed.
36. SKIP

This causes skipping of the field for which it is pressed.
It is normally used for skipping the unused right-hand
portion of an alphabetic field.

37. REG (CARD REGISTER)
This key is used primarily when inserting cards manually:
1. Registers the cards at the punching and reading
stations.
2. Stacks the cards from the left of the card bed.
38. AUX DUP (AUXILIARY DUPLICATE)
This is supplied only when the machine has the auxiliary duplication feature. It causes duplication fromthe master card on the auxiliary duplicating drum.
Under program control, pressing the key once duplicates the entire field from the master card; without
program control, pressing it once duplicates one column from the master card.

39. ALT PROG (ALTERNATE PROGRAM)
Supplied only when the machine has the alternate program feature. Press this key, either at the beginningor during the card cycle, for each card requiring alternate instead of normal program control. If the key ispressed when a card is not registered at the punchingstation, it also causes a feed cycle.

44. MULT PCH (MULTIPLE PUNCH)
This is held down to permit the punching of more than
one digit in a column. The keyboard is in numericshift when this key is pressed.
45. CORR (CARD CORRECTION)
Supplied only when the machine has the card correction feature. Press this key upon detecting an error
and before keying the next column of information.
This action moves the error card to the read station
and reproduces the information (up to the error column) into a new card at the punch station. Then, key
in the correct information and resume operation.

37

IndexAlphabetic Field-Limit Feature ...................... 25
Alphabetic and Numeric Keyboard . . . . . . . . . . . . . . . . . . .. 11
Alphabetic and Numeric Punching with Program Control.. 16
Alphabetic Shift (1) ................................ 12
Alphabetic Shift Key ............................... 14,36
Alternate Program Feature. . . . . . . . . . . . . . . . . . . . . . . . .. 21
Alternate Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 28
Automatic Duplicate Switch .................. . . .
15
Automatic Duplication (0) .......................... 12
Automatic Duplication-Suspension on First Card . . . . . .. 33
Automatic Feed Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15
Automatic Skip and Duplicate Switch . . . . . . . . . . . . . .
15
Automatic Skip (11) ............................... 12
Auxiliary Duplicate Key ............................ 12, 28
Auxiliary Duplication Feature. . . . . . . . . . . . . . . . . . . . . . .. 21
Backspace Key ................................... "10

Card Correction Feature. . . . . . . . . . . . . . . . . . . . . . . . . . ..
Card Hopper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Card Insertion Feature .............................
Card Removal ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
Card Stacker . . . . . . . . . . . . . . . . . . . . .
Card Visibility . . . . . . . . . . . . . . . . . . . . . . . . . .
Chip Box and Fuses . . . . . . . . . . . . .
Clearing the Card Bed . . . . . . . . . . . . . . . . . . .
Column Indicator ..............................
Combination Alphabetic and Numeric Keyboard. . . . . . ..
Combination Keyboard Summary . . . . . . . . . . . . . . . . . . . ..
Combination Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corner Cuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

22
8
24
32
9
9
11
32
10
11
36
36
33

Dash Skip or Dash Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 16
Duplicate Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
Duplicating. ... . . . . . . . . . . . . . . . . . . . . . . . . . .
. .. 12, 17, 33
Eight (8) Code ................................... 21, 24
Eleven (11) Code ................................ 21, 24
Engaging the Program Reading Mechanism ......
32
Error Correction .. . . . . . . . . . . . . . . . . . . . . . . . . . . .
17Error Correction-Partially Prepunched Cards . . . .
18
Features .......................................... 21
Feed Key..... ...... ............ ....... .. ......... 15
Feeding ···.· ................................... 8, 9 14
Field Definition (12) ............................... '12
Five (5) Code .................................... 21, 24
Four (4) Code ................................... 21, 24
Function Control Switches ............ "............. 11
Functional Keys ................................... 36
Fuses ............................................ 11High-Speed Skip Feature . . . . . . . . . . . . . . . . . . . .. . . . . . ..
Hopper....... ... ...... ...........................

24
8

IBM 24, Normal Program ........................... .
IBM 26, Printing Features ........................... .
IBM 26, Ribbon Replacement ....................... .

28
20
35
14
22

Inserting Cards Manually ......................... .
Interspersed Gangpunch Feature .................... .
Introduction .......................................
Keyboard Locking ................................ .
Keyboard Summary ............................... .
Keyboards .................................... .
Left Zero-Print (2) ............................... .
Locking of the Keyboard ........................... .
Main-Line Switch ..................................

38

5
33
36
11
20
33
9

Manual Insertion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14
Multiple Functions ............................ . . . .. 29
Multiple-Punch Key......................... 33, 37
Multiple-Punched Columns. . . . . . . . . . .
33
Nine ({)) Code . , , , , , , , . ' , . , . , .. , . , .. ' .... , .. , . . . .. 21
Normal Program .. " . " . " " " . " " " . , . , .. ,."., ,12, 23
11
Numeric Keyboard. , . ' , . , , . , , , . , ' , , . , , , . , .. , ,Numeric Punching with Program Control
15
Numeric Shift Key; Alphabetic Shift Key
14
One (1) Code , , , ' , , ' , , , .. , , ' , , . ' , , , , , , . , . , , , . ' , . ,12, 21
Operating Features . , , , . , ' , , ' , , , , , . , , . , .. , ,8Operating Sugestions ,"""'"
32
14
Operations',,,,,,,
Postcard Stock Feed Feature '"Preparing a Program Card .,"Prepunched Master Card Insertion
Pressure-Roll Release Lever, , , , , ,Print Suppression (3) ,Print Switch ""',.,"",,,.,,,.,
Printing Features " " " ,',,,,,,,,
Printing Mechanism",,:.,""',',
Procedures for Alphabetic and Numeric Punching with
Program Control '" , , , , , , , , . ,Procedure for Correcting Errors ",.
Procedure for Correcting ErrorsPartially Prepunched Cards , , , ,' ,,,,,, ,Procedure for Inserting Cards Manually, ,Procedure for Inserting Prepunched Cards ,',"'" , , , ,Procedure for Numeric Punching with Program Control,
Program Card ".,',',.,""""
Program Card Codes',
Program Card Preparation , . , , , , , , 'Program Control Lever .,""'"'.,
Program Drum " " " " " " . " " , .. "",.".""
Program Example '"Program Planning Card ",.,
Program Reading Mechanism
Program Unit, ' , , . , , , , , , , , , , , . , , ' , . , , ... , , , , .. , , , "Punching Keys ,,', ... ,.,"',.,"',.,', .. ,"""'"
Punching Multiple Digits """.,.,',.,." .. ,., .. ".
,,.,,.,,,,,
Punching Positions .".".,.,", .. ,Punching Station . ' , , , ' , . , , . , . , . , . , , .. , . , . , . , , . , , . , '

25
28
19
10
20
20
28
11

18
15
19
15
12
12
28
10
12
30
29
10
10
36
33
5
8

Reading Board " " " " " " " " " " " " " " " " " "Reading Station . " " " ' , .. ,',., .. ,,"""",.,',,.
Register Key .,', ... ".,.".'.,.,""",., .. ,"""
Release Key .. ,,"', .. , ... ,",',.,"""',',.,""
Removing a Card from the Center of the Card Bed , , , , "Removing a Card from the Left of the Card Bed, , , , .. , .'Removing a Card from the Punching or Reading Station"
Ribbon Replacement "., ... ,.,.,., .. ,." .. ,.,"""

10
9
14
14
32
32
32
35

17
17

Self-Checking Number Feature " ... "'"'" .. ,,.,,.. 24
Seven (7) Code , ' , , , , , . , .. , . , . , ... , , , , , . , ' , , . , ... , 21
Shift Keys " " " " " " " " " " " " " " " " " " " .14,36
Single-Card Feeding , , . , .. , ' ... , , , , . , ' , , , , , , , , , , . , .. 33
Six (6) Code , . , , ., . , . , , . ' , . , . , , , . , . , , . , , , , .. , , ' , "21
Skip Key ,." ..... , ..... '.,.,., .... " .. " ..... ""16
Skip Key (11 Punching) ""., .. , .. ,." ... , .. , ... ,' 17, 39
Skipping . , . , , . , , . , , .. , . , ' , . , ..... , . , , 12, 15, 16, 24, 34, 37
Space Bar , .. ' ... ".',.,.".,',.,.,', .... ,.,36
Spacing over Columns " " " " " " " " " " " " " " "32
Special-Character Arrangements " " " " " " " " " " "27Special Character Keys .... , ............ , ... , .. ' .. , ,. 36

Special Character Printing, , , ' , , , , , , , , , ,27Special Features .,.,............
. ,. ,. ,...
21
Stacker ' ... , . , . , . , ... , . , ... ,. , .. , . . .
9Starting a Punching Operation' .,..... ,.
32.. , , . , , . , .
32
Stopping a Punching Operation
32
Suggestions for Operating ....... , ... ,"',.,.,
Summary of Combination Keyboard .. ,'..
36
33
Suspending Automatic Duplication on First Card . .
. . , . ,9, 11, 20
Switches ........ , . , ....... , , . , ..... , . .

Three (3) Code. , ..
Twelve (12) Code.
Two (2) Code "',., ....... .
Variable-Length Card Feed Feature
Visibility of Cards ....
X-Punching and Skipping
Zero (0) Code .. ,.,.
Zero Printing . , ..... ' ..

.. 12,21.12,21... 12,2026
933... 12,21, .. 20,29

39