Preliminary Description of the UNIVAC
Preliminary Description of the UNIVAC for EMCC Personel Only.
11x8 inches. 54 leaves (printed on one side only). Offset printed (?). Intended as an internal document, only. Copyright and printed 1950 (Revised. 7/19/50) by the Ekert-Mauchly Computer Corporation, a Subsidiary of Remington Rand Inc. Marked: “U-300” and "#192". RARE. $2250
A note on the author: who is identified on as “HFMjf:mb” (as the last line of the document). This is almost certainly Herbert F. Mitchell, Jr., who we find identified in the Grace Hopper papers at the Smithsonian Institution (and who was author of “Outline for First Lecture: Programming Course for EMCC's Engineers”, 4/4/50; A-TC-7 by HFM jr (Herbert F. Mitchell, Jr.), 4 pages and “Outline for Second Lecture: Programming Course for EMCC's Engineers”, 11 April 1950; A-TC-7, no author but probably by H.F. Mitchell (see First Lecture), 2 pages. AND with J. Presper Eckert, Jr., James R. Weiner, H. Frazer Welsh “The UNIVAC System”, American Institute of Electrical Engineers Institute of Radio Engineers Conference, pp. 6-16, December, 1951. Dr. Herbert F. Mitchell was the Director of the Computational Lab at Ekert-Mauchly: . “Dr. Grace Hopper was among the staff as well as Betty Holberton, Al Tonik, Art Katz, Hildegard Nidecker, and Dick Woltman. Paul Chinitz, Steve Wright, Harvey Rubinstein, Lloyd Stowe…” ALSO: Mitchell: Ph.D. Applied Mathematics, Harvard, 1948 (helped Howard Aiken build the Mark II); joined Ekert-Mauchly in November, 1949 and continued with Univac and Sperry Rand until 1959 (and was chief programmer on the UNIVAC I, and later, sales manager).
This work is composed of 26 sections, as follows, and seems to be a rather complete description of the running of the UNIVAC as could be in 54 pages:
- Initial read Operation
- Four-stage Cycle of Operation
- Data Transfers
- Arithmetic Operations
- Overflow Routine
- Control Transfers
- Tape Instructions
- Read Instructions
- The Write Instructions
- Read Tape Instructions
- Supervisory Control Operations
- Recorder Transfer of Control
- The Writer Operations
- The rewind Instruction
- The Breakpoint Instruction
- Supervisory Control Input
- Tape Reversal
There are also two full page sheets of block diagrams:
--Simplified Block Diagram Central Input-output and Interlock Circuits
--Simplified Input circuits // Simplified Output circuits
Binding: punch-bound in a period manila binding with metal compressors. Cloth tape spine. Typed, home-made (contemporary) title on front of binding.
Everything in VERY GOOD condition. Rare. Only three copies found in OCLC/WorldCat.
From Book Rags:
"UNIVAC (Universal Automatic Computer) was the first
mass-produced commercial computer. UNIVAC was the result of a collaborative
effort between computer pioneers John
Mauchly (1907-1980) and J.
Presper Eckert (1919-1995). Their partnership in building advanced
computers began in the early 1940s at the Universityof Pennsylvania