ThesaHelp: references cd
Topic: history of computers
Group: data value
Topic: history of programming
Topic: interface between program modules
Topic: consistency testing
Topic: what is a computer
Topic: resourceful, redundant systems for reliability
Topic: software documentation
Topic: program listing
Topic: flow diagrams and flow charts
Topic: quality assurance
Topic: function library
Group: coordination system
Topic: programming language standards
Topic: standards
Group: parallel processing
 
Reference
The staff of the computation laboratory,
"A manual of operation for the automatic sequence controlled calculator",
The Annals of the Computation Laboratory of Harvard University, 1, Cambridge Massachusetts, USA, Harvard University Press, 1946.
Google
Quotations
2 ;;Quote: in 1642, Pascal designed and built the first mechanical adding machine; for accounting; used rotating wheels that automatically carried to next position
 2 ;;Quote: use complementary numbers for subtraction
 3 ;;Quote: in 1666, Morland built a mechanical adding machine for multiplication; used repeated addition
 3 ;;Quote: in 1694, Leibnitz built a machine for multiplication using a crank to set and turn all wheels simultaneously; his stepped reckoner remains in use
 5 ;;Quote: Babbage used Jacquard cards, punched cards read by needles that raised particular warp threads; interlaced with twine in an endless sequence, pegs guided the cards over a cylinder
 5 ;;Quote: Babbage separated variable cards for the store, from operational cards for the mill; parameterized solutions to mathematical problems
 5 ;;Quote: Babbage's engine would ring a bell for values of a transcendental; if given the wrong card, it would ring a louder bell
 11 ;;Quote: the Automatic Sequence Controlled Calculator was five tons and 51 feet long; visualized in 1937 as a panels dedicated to mathematical operations
 11 ;;Quote: the Automatic Sequence Controlled Calculator had a multiplying unit, dividing unit, 72 adding registers, 60 constant registers, tables of log x, sine x, and 10^x; like mill and store of Babbage
 11 ;;Quote: the sequence control unit reads 24bit commands (move A to B and start C) from a perforated paper tape
 288 ;;Quote: use an independent check of the result to detect incorrect switch settings and incorrect plugging
 288 ;;Quote: check for mechanical and electrical failures frequently; no more than 20 minutes without checks
 289 ;;Quote: produce a coding sheet and diagram that specify all details of the coding; allocate storage counters to the computation; indicate prints, interpolations, and checks
 289 ;;Quote: before running a sequence tape, manually simulate the computation on a degenerate case or initial point; compare intermediate and final results with the actual computation
 290 ;;Quote: the operating instructions for a sequence tape include the switches, tapes, card feeds, card punch, typewriters, counters, checks, plugging, and rerun instructions
 292 ;;Quote: for sequence tapes in the tape library, the starting tapes should check all switches, plugging, and functional units; otherwise, they just compute the initial values
 292 ;;Quote: standardize the preparation of control tapes and operating instructions; group enterprise; minimizes special instructions
 292 ;;Quote: evaluate a fourth degree polynomial in 13.8 seconds (46 cycles)
 292+;;Quote: can interpose additional computation for a quarter of the cycles; reduces time to 9.9 seconds
 336 ;;Quote: since 1943, tabulated complex functions, solved linear equations, statistical analysis, zeros of a function, and partial differential equations

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