Software on Hard Disk for the HP250 Computer, General Ledger
date: label: date made
content: ca 1980
name: label: maker
content: Hewlett-Packard Company
notes: label: Description
content: This is one of three disc packs received with an HP 250 computer. The white plastic case has metal inserts at the center of the bottom and in one section of the bottom. A paper tag on the bottom reads: HEWLETT-PACKARD (/) MODEL NO. 12940A (/) MADE IN U.S.A. A tag on which to list "FLAGGED TRACKS" has no tracks listed. Another sticker reads: EZ 1555 5. A tag on the top reads: CAUTION (/) USE ONLY IN HEWLETT-PACKARD (/) 7905/7906 DISC DRIVE. A tag on the side reads: GENERAL LEDGER.
label: Description
content: The disc stayed within its plastic case. When inserted into the 7906 drive, a mechanism released and lifted the end of the plastic "tongue" that runs across the diameter of the pack. It was lifted just enough for two read/write heads to travel into the pack, lower onto each side of the platter and read the data, all while the disc spun at high speed. The drive also pumped filtered air into a port on the underneath of the pack which exited at the opening for the heads – that helped keep dust out and provided a cushion of air for the heads to ride on.
label: Description
content: For the computer, including a disc drive, see accession 1989.0023, especially 1989.0023.01.4.
label: Description
content: Reference:
label: Description
content: Personal Communication, David Collins.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Computers
creditLine: label: Credit Line
content: Jack R. Warner
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1989.3009.14
label: catalog number
content: 1989.3009.14
label: nonaccession number
content: 1989.3009
objectType: label: Object Name
content: software
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: 1 1/2 in x 15 in; 3.81 cm x 38.1 cm