|
Manufacturer: |
Victor Comptometer Corp., Business Machines Group |
|
Model Number: |
18-1441 |
|
Serial Number: |
4141-500
|
| Date of Manufacture: |
Late-1971 |
| Manufactured In: |
USA, Chicago, IL |
| Original Price: |
$445 |
| Weight: |
7 Pounds |
| Size: |
9 1/2" Wide, 11 1/2" Deep, 4 3/4" High |
| Power Requirement: |
10 Watts, 115V AC, 50/60 Hz |
| Display Technology: |
Burroughs Gas-Discharge 16 digit w/comma indicators |
| Logic Technology: |
Six Chip Rockwell-made LSI Chipset |
|
Chip Part Numbers: 10177, 10178, 10179, 10180, 10182, 15000 |
|
Chip numbered 15000 appears to be the Read-Only Memory (ROM) that contains the operational microcode for the calculator |
| Digits of Capacity: |
14 |
| Decimal Modes: |
Full floating |
| Arithmetic Logic: |
Arithmetic |
| Math Functions: |
Four Function |
| Constant: |
Automatic for multiply & divide |
| Memories: |
One, w/add & subtract function keys |
|
[=+] and [=-] keys to add/subtract products/quotients to/from memory |
| Notes: |
Unusual [∩ SET] key for setting roundoff digit position and [∩] key for forcing roundoff
|
|
Six different display calculator models in the 1800 series:
|
|
- Model 18-1440: Four Function, No Memory |
|
- Model 18-1441: Four Function, 1 Memory |
|
- Model 18-1442: Four Function, 2 Memories |
|
- Model 18-1541: Four Function √, 1 Memory |
|
|
- Model 18-1542: Four Function √, 2 Memories |
|
|
- Model 18-1721: Scientific w/1 Memory |
|
