RCA 301 Programmer's Reference Manual page 228

Bucket.
The logical 3488 software addressing unit containing records and/or tags comprised of one or more con­
secutive blocks and having many of the properties of a batch on magnetic tape.
Home Bucket. The originally specified location of a record.
Visitor/Substitute/Overflow Bucket.
is unable to contain the data record.
Bucket Header.
A control field
(flaw/tag/overflow) of the bucket and the physical limits of the bucket.
Bucket Overflow.
A condition that occurs when a record/tag will not fit into a bucket and must be placed elsewhere.
Buffer.
A storage device used to compensate for a difference in rate of flow of information or in time of occurrence
of events when transmitting information from one device to another, as from an input device to the High-Speed
Memory, or from the High-Speed Memory to an output device.
Bus. A main circuit, channel, or path for the transfer of information.
Capstan. (Refer to DRUM.)
Card. Any card adapted for being punched in an intelligent array of holes for the storage of information.
Card (3488 Card).
The basic storage element of the 3488.
Home Card. The originally specified card for location of a data record.
Card Column.
One of a number of columns in a card into which information is entered.
Card Feed. A mechanism which moves cards one by one into a processing device.
Card Overflow.
A condition that occurs when there is no longer room on a 3488 card for the information being
processed.
Card Punch.
A mechanism which punches
Card Reader.
A mechanism that reproduces the information on cards in another form, usually electrical signals.
Card Stacker.
A mechanism that stacks cards after they have passed through a machine.
Carry.
(1) A condition occurring during addition when the sum of two digits in the same column equals or exceeds
the base number. (2) The digit to be added to the next higher column.
Cell.
An addressable area on the Data Record File. A cell may contain from one to 900 characters.
Channel. A Control Module which enables the selection of 3488 cards under program control. It also performs
character parity checking and character buffering between a processor and a 3488.
Character.
One of a set of elementary symbols which may be arranged in ordered aggregates to express information.
These symbols, typewrite symbols, and any other symbols which a computer may read, store, or write.
Code
(noun). A system of symbols and rules for their use in representing information. A language.
Pulse Code.
The binary representation of characters.
Operation Code.
The code representing an operation (add, subtract, transfer, etc.) built into the hardware of the
computer.
Complement (noun). A quantity which is derived from a given computer quantity by the following rules:
a. Complement on n (as in tens complement). Subtract each digit of the given quantity from n-1, add unity to
the least significant digit, and perform all resultant carries.
b. Complement on n-1 (as in nines complement). Subtract each digit of the given quantity from n-1.
J
-2
APPENDIX J. GLOSSARY OF TERMS (Continued)
The secondary location for the storage of information when the Home Bucket
at the beginning of a bucket consisting of 10 characters containing the status
cards.
An automatic card punch punches
cards
according to a stored program.