708 / | HD | ELECTRICAL COMPUTERS: ARITHMETIC PROCESSING AND CALCULATING |
100 | DF | ELECTRICAL DIGITAL CALCULATING COMPUTER {10} |
200 | DF | .~ Particular function performed {26} |
490 | DF | .~.~ Arithmetical operation {27} |
530 | DF | .~.~.~ Error detection or correction {4} |
534 | .~.~.~.~ Plural parallel devices |