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  1. Proceedings of the fourth international conference on APL (APL '72)
  2. Every little bit hurts: Saving money by saving space in APL
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Is APL epidemic? or a study of its growth through an extended bibliography
An APL approach to interactive display terminal graphics
Graphics in APL
An interactive APL graphics system
Modeling a satellite experiment on APL
Representing negative integers in bit vectors
APL as a teaching tool: Two versatile tutorial approaches
The evolution of an interactive chemistry laboratory program
A collection of graph analysis APL functions
Management of APL time-sharing activities
Every little bit hurts: Saving money by saving space in APL
Security of APL applications packages
A PL/1 batch processor for APL
Subtasking in APL
Suggestion for a “mapped”, extension of APL
APL as a notation for statistical analysis
An adaptive query system
Microprogram training - an APL application
ECAPL-An APL Electronic Circuit Analysis Program
Use of APL in teaching electrical network theory

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Every little bit hurts: Saving money by saving space in APL

Content Provider ACM Digital Library
Author Alercia, Richard Swiatek, Robert Weinberg, Gerlad M.
Abstract The State University of New York at Binghamton has been a user of IBM's APL system since the earliest releases, and currently runs about 50 ports on a model 155. At the time of our study, 1400 user numbers accounted for approximately 5000 tracks of 2314 space. A persistent trouble in our system seems to be one of inadequate space on disk files. At the beginning of a semester there is quite a bit of space, but as the weeks pass on, the disks fill monotonically until users begin to feel the effects. Each passing year seemed to see the addition of another 2314 to the system, in order to solve the previous year's problems, and each year the system fills up. Other installations have told us of the same difficulty, so we decided to investigate the problem. We conducted our investigation during the Fall of 1971, through a survey and through detailed investigation of a random sample of individual users' workspaces. Our sample generated 295 user numbers, two of which were no longer in use and 48 of which were locked. We respected all locked numbers and workspaces—of which there were only seven under unlocked numbers. Altogether, then, we investigated 245 numbers. We realize that the profile of locked numbers may be different from that of the unlocked, but we do not know how to adjust for the difference. We conjecture that the average locked user is a larger, more sophisticated user, and since they seem to waste more space among the unlocked, we imagine that our estimates are consequently on the conservative side.
Starting Page 115
Ending Page 118
Page Count 4
File Format PDF
DOI 10.1145/800011.808116
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 1972-01-01
Publisher Place New York
Access Restriction Subscribed
Content Type Text
Resource Type Article
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