World Library  
Flag as Inappropriate
Email this Article

Ibm 602

Article Id: WHEBN0002834303
Reproduction Date:

Title: Ibm 602  
Author: World Heritage Encyclopedia
Language: English
Subject: IBM 603, Plugboard, 1946 introductions, Cuthbert Hurd, Programmable calculators
Collection: 1946 Introductions, Ibm Unit Record Equipment, Programmable Calculators
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Ibm 602

The IBM 602 Calculating Punch, introduced in 1946, was an electromechanical calculator capable of addition, subtraction, multiplication, and division. The 602 was IBM's first machine that did division. (The IBM 601, introduced in 1931, only multiplied.) Like other IBM calculators, it was programmed using a control panel. Input data was read from a punched card, the results could be punched in the same card or a trailing card.

The 602 was available in four models: Model 1, Model 2, Model 50, and Model 51. The "Series 50" models were low cost versions that ran at a slower speed, with half as many program steps, and fewer storage registers and counters.

Model Machine
Cycles
per Minute
Program
Steps
12-Digit
Storage
Units
6-Digit
Counters
4-Digit
Counters
Functions
1 200 12 6 3 3 +, -, *, /
2 200 12 6 3 3 +, -, *, /
50 150 6 4 3 1 +, -, *, /
51 150 6 4 3 1 +, -, *

Two additional counters were available as an optional feature.

Program steps execute in one machine cycle, except for steps performing multiplication or division which take as many machine cycles as needed for the operation. Punching rate is roughly four columns per machine cycle. The total number of machine cycles required per card varies depending on the data and programming.

Programming the 602 for each problem involved two things:

  1. A control panel wired for the sequence of the calculation
  2. A Skip Bar with "inserts" placed for the first column of each field to punch

See also

References

External links

  • Columbia University Computing History: The IBM 602 Calculating Punch
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.