Hewlett-Packard 67
Brief History
Hewlett-Packard produced the first programmable pocket calculator, the HP-65 in 1974. The further development didn't stop, moreover boosted by introducing Texas Instruments' SR-52 in 1975. The next programmable model, the HP-67 didn't exceed its predecessor in its size or number of keys, but in program and memory capacity. Mainly, the programmability was improved - e.g. 224 program steps instead of 100, 26 memory registers instead of 9, 11 types of conditional jumping criteria, indirect addressing etc. -, but it had a novelty of calculating statistics. Although some operations are very complicated to use, the labellings printed over and under are a bit confusing, but after some practice, it became a brilliant assistant.
One of its speciality is compatibility with the HP-97 desktop programmable calculator, both can read and write magnetic cards from each other.
The HP-67 and HP-97 were a big success, until introducing the big competitor's Texas Instruments TI-59 in 1978, no such calculator were available to compete with these models.
| Manufacturer: | Hewlett-Packard Corporation (USA/Singapore) |
| Mfg. date: | 1976-82 |
| Size: | 8×15,1×3,5 cm |
| Weight (ready for operate): | n.a. |
| Type: | programmable scientific |
| Capacity: | 10/10+2 digits (input/display) 10+2 digits (internal precision) |
| Operating logic: | RPN |
| CPU: | MOSTEK MK6250N + MK6216N |
| Registers: | 4 standard 26 memory (with aritmetic) 4 flag |
| Features: | %calculation with percent +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Fixfixed-point notation: the listed decimals can be chosen (0-9) Sciscientific (exponential) notation Sqrsquare root x2square pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) DMS-DDconversion of decimal and sexagesimal numbers logexponential and logarithmical functions (10- and e-base) yxraising to power SDone variable statistics: calculating mean and standard deviation P-Rconverting coordinates between rectangular and polar systems n!factorial |
| Display: | 15 digit LED (3×HP IC-tokozású) |
| Power: | battery pack or adaptor |
| Programming method: | merged keystroke-programmable |
| Program capacity: | 224 steps |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.00006185 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 - |
HP-67
HP-67 with manuals and magnetic cards
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