RCA 301 Programmer's Reference Manual
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APPENDIX J. GLOSSARY OF TERMS (Continued)Simultaneity. The ability of the computer to execute more than one instruction at the same time.Slot. An eight-character field in the File Parameter Area containing the address of the User Bucket area.STA. Store A Register (automatic storage of final contents of A Register).Standard Memory Locations. Designated locations in the HSM which are used for Arithmetic Tables, automaticstorage of the final contents of certain Registers, etc. (See Appendix E.)Start Time. Time between the command to start an input/output device and the reading or writing of the firstcharacter.Storage (Memory). A device into which units of information can be transferred, which will hold this information,and from which the information can be obtained at a later time.STP. Store P Register (automatic storage of final contents of P Register).System. An assemblage of equipment units or instructions, or routines, designed to operate as a whole.System Control Card. A description of every data file and magazine. Contains the following:Data File Index. File ID and address of data file description.Data File Description. Description of a data file. (Number of characters per record, number of blocks per bucket,and record type.)On-Line Catalogue. Record of the locations of all magazines on-line.Magazine Serial Number Index. Serial numbers of all magazines in the System.Magazine Description. Description of all files including the allocated areas.System Control Magazine. The magazine which contains the System Control Card(s).Tag (Tag Address Record). Appears in a bucket and represents a Data Record which has been moved to anotherbucket. It contains the primary key of the moved record and the address of the bucket to which it was moved.Tag Overflow. A condition where all records have been moved and the bucket contains all tags instead of records.1'RA. Translate by Table.Track. An addressable area on the Data Disc File. One track contains 10 sectors of 160 characters each, or 1600characters.Unwind. Move a tape in the forward direction.Working Storage. A portion of the internal storage reserved for intermediate and partial results during computation.Zone. An addressable area on the Data Disc File. A zone consists of 128 tracks of 1600 characters each. One read-write arm services the 128 tracks.J-7 |
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