[DOC] [TLE] The history of the calculator - The Calculator Site [PAR] Learn all about how the calculator came about from the mechanical age all ... 
millennia to evolve and only reached its current form in the 1990s, ... The history 
of the calculator is split into four pages - one for each chapter: ... This was the first 
in a line of office calculating machines that made the ... Last update: 24 March 
2014... [DOC] [TLE] Slide rule - Wikipedia [PAR] The slide rule, also known colloquially in the United States as a slipstick, is a 
mechanical ... In its most basic form, the slide rule uses two logarithmic scales to 
allow ... These common operations can be time-consuming and error-prone 
when .... For example, to calculate 32, the 1 on the top scale is moved to the 2 
on the... [DOC] [TLE] Mechanical calculator - Wikipedia [PAR] A mechanical calculator, or calculating machine, was a mechanical device used 
to perform ... The first one was an automatic mechanical calculator, his difference 
engine, ... These machines always produce identical results for identical initial 
settings ..... The last of the mechanical calculators were likely to have short-cut... [DOC] [TLE] Digital Computer Museum Catalog [PAR] Computing devices -- as beautiful as shells to many people -- need a ... These 
contained the drawings for the first known digital machine to perform calculations. 
... When one or more significant ideas are transformed into a project, then its 
execution ..... "Slide Rule 689", KEUFFEL & ESSER, ca 1950, 32x6x1 cm, (B32.
52). [DOC] [TLE] 1. Types of Computers - Wikimedia Commons [PAR] Mar 9, 2015 ... 4.4 Analogdigital hybrid computers and hybrid computing devices . .... Altair 
8800, introduced in 1975. The term microcom- ..... spite these drawbacks, the 
use of the TDC was an impor- .... nan by North Korea in 2010, the last warship 
sunk by a ..... The advent of digital computing and its success made. [DOC] [TLE] AllAboutSlideRules_OughtredSocietyPublication_rev121001 - Scribd [PAR] culator, rather than a serial one like your desktop electronic calculator. Once a ... 
These features, when coupled with the slide rule's different scales and labels, 
hint of great ..... Our last century could not have been built without it, yet its direct 
.... Fine plastic rules were made by Keuffel & Esser, Post (made by Hemmi for. 
Post)... [DOC] [TLE] History of computing hardware - Wikiwand [PAR] Other early versions of mechanical devices used to perform one or another type 
... He built twenty of these machines (called Pascal's Calculator or Pascaline) in 
the .... All the parts for his machine had to be made by hand - this was a major ...... 
As late as 1975, Sperry Univac continued the manufacture of second-generation
... [DOC] [TLE] Full text of "The Computer Museum Report Fall/Winter 1985" [PAR] On their retirement from active use, a judgment will be made as to whether they ... 
If anyone has a button The Computer Museum Report Fall/Winter 1985 1 THE ... 
card equipment and oth er pre-computing devices are omitted) N umber of ...... 
and Mrs. William Dobratz Keuffel & Esser Company, Log Log Duplex Slide Rule,
... [DOC] [TLE] Digital Computer Museum First Annual Report Al though the idea for th [PAR] Apr 23, 1980 ... the g~nerations of pre-computer calculating devices and writing a A/V ... tv.x:> 
films -- one made by Nntional Educational Television and the... [DOC] [TLE] Computers [PAR] Nov 3, 1971 ... memory used in computers and other electronic devices to store .... began to take 
on its more familiar meaning, a machine that carries out ... automated calculation 
and programmability. ... owned one of these portraits ; it inspired him in ..... For 
example, a computer can be made out of billiard balls (billiard... [DOC] [TLE] singmaster [PAR] Computing devices also owe a historical debt to mechanical devices, particularly 
automata. ..... c1750 Simpson gives his rules for estimating integrals, though 
these were ...... One 704 ran from 1957 to 1975, but was sold for $1 in 1967. .....

Question: Keuffel & Esser, the dominant maker of these calculating devices, made its last one in 1975
Answer: slide rule