Product number (P/N): 920,
Keywords/Tags: 920
Date of intro: 1975, Origin: Mexico (List), Dimensions: 425x297x155mm,
Power: AC,
Display: Type = Display (Gas disharge) (List),
Number of keys: 53, #Key-Blue: 10, #Key-Grey: 30, #Key-Red: 2, #Key-White: 11,
Round switch: [DEC FL-RD-(ArrowDown)], Miscellaneous switch: [MCR LOAD-TEST-REC PRINT ON-OFF ADD MODE-CALC],
Classification: / Desktop with Display+Printer / Printer (thermal) / Card reader,
Featuring: Scientific functions, Square root, Programmable, Memories: 9, Programmable Steps: 448,
Main Components: ROCKWELL: A0577PA; ROCKWELL: A0578PB; ROCKWELL: A0579PB; ROCKWELL: A0580PB; ROCKWELL: A0581PA; ROCKWELL: 10432PC {3x}; ROCKWELL: 10432PD {4x}; ROCKWELL: 10660PD; ROCKWELL: 10696PA,
Other components: MOTOROLA: MC14515CP,
Serie-members: ROCKWELL: 920 (9 Mems, 192 ProgSteps); ROCKWELL: 920-2 (41 Mems, 192 ProgSteps); ROCKWELL: 920-3 (96 Mems, 996 ProgSteps); ROCKWELL: 930 (); ROCKWELL: 940 (); ROCKWELL: 960 (); ROCKWELL: 960-3 (),
Collector value: 8.5/10,
Info: The ROCKWELL: 900 series programmable calculators were designed for people who have never used a programmable.
It is a line of machines in a full range of business machines.
They all are including a printer, a display, a magnetic card reader.
To load a program, the operator depresses one key and inserts the card into the slot. The program loads instantly and the card pops up for removal.
Each magnetic card can store 256 program instructions on each side, or a total of 512
Cards can be used for data storage as well as program storage. They are easy to handle and file, with the title of each program visible.
Standard functions on the keyboard include reciprocals, powers, square roots, natural logs and antilogs.
The machines are using ‘keyboard’-language, a straightforward calculator language. The calculators have full decision-making capability,
with conditional and unconditional jumps. Direct addressing to permit jumps directly to a step number.
Symbolic addressing on any label for simplified programming.
The ability to list programs on the printed tape. Simple debugging and editing, with easy program expansion or contraction.
Subroutine capability of nesting up to five levels deep. Memory indirect (INDIR), a powerful pointer-memory that simplifies and shortens programs.

920-specs:
14-digit printing/displaying, 10-key accumulator (+, -, S, T, Add mode), calculator functions, automatic item and accumulation counters,
automatic 1st and 2nd factor accumulations, 9 basic registers and optional expansion registers with direct register arithmetic, indirect register addressing,
1/x, x(PowerY), ln x, e(PowerX), Square Root, overflow and error detection, tape audit symbols, 192 basic programming steps with optional expansion,
program edit functions (replace, insert, delete, back-up, list, trace), subroutine nesting, conditional and unconditional program transfers (positive, negative, zero, no entry),
absolute and label program addressing, magnetic card system with card validity test.
Internet: Link-1: VINTAGE CALCULATORS WEB MUSEUM, Link-2: CENTRE FOR COMPUTING HISTORY

!!! This item is WANTED to join the collection !!!