131:
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310:'s design requirement was that the calculator should fit in his shirt pocket. That is one reason for the tapered depth of the calculator. The magnetic program cards are fed in at the thick end of the calculator under the LED display. The documentation for the programs in the calculator is very complete, including algorithms for hundreds of applications, including the solutions of differential equations, stock price estimation, statistics, and so forth.
27:
454:
450:) because the other half of the card was touched by the rubber wheel during transport, causing extra abrasion. When inserted into an extra slot between the display and the keyboard, the printing on top of the card would correspond to the top row of keys (A - E), which served as shortcuts to the corresponding program entry points.
445:
A program could be saved to mylar-based magnetically coated cards measuring 71 mm × 9.5 mm (2.8 in × 0.4 in), which were fed through the reader by a small electric motor through a worm gear and rubber roller at a speed of 6 cm/s (2.4 in/s). The recording area
441:
The HP-65 had a program memory for up to 100 instructions of six bits which included subroutine calls and conditional branching based on comparison of x and y registers. Some (but not all) commands entered as multiple keystrokes were stored in a single program memory cell. When displaying a program,
318:
The HP-65 introduced the "tall", trapezoid-shaped keys that would become iconic for many generations of HP calculators. Each of the keys had up to four functions. In addition to the "normal function" printed on the key's face, a "gold" function printed on the case above the key and a "blue" function
465:
The HP-65 had an issue/design flaw whereby storage register R9 was corrupted whenever the user (or program) executed trigonometric functions or performed comparison tests; this kind of issue was common in many early calculators, caused by a lack of memory due to cost, power, or size considerations.
416:
Functions included square root, inverse, trigonometric (sine, cosine, tangent and their inverses), exponentiation, logarithms and factorial. The HP-65 was one of the first calculators to include a base conversion function, although it only supported octal (base 8) conversion. It could also perform
295:
of $ 795 (equivalent to $ 4,912 in 2023), it featured nine storage registers and room for 100 keystroke instructions. It also included a magnetic card reader/writer to save and load programs. Like all
Hewlett-Packard calculators of the era and most since, the HP-65 used
486:. Two HP-65s were carried on board the Apollo spacecraft. Calculation of parameters for the several thrusting maneuvers needed to rendezvous with the Soyuz spacecraft was done on the HP-65 and compared with the results calculated by the onboard
461:
Cards could be write-protected by diagonally clipping the top-left corner of the card. HP also sold a number of program collections for scientific and engineering applications on sets of prerecorded (and write-protected) cards.
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used only half of the width of the card. While reversing the card to store a second program was possible, it was officially discouraged (unlike in later models such as the
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490:. Another program for the HP-65 allowed the crew to compute pointing angles for the spacecraft antenna for aiming at the ATS-6 communications relay satellite.
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How Much Is That in Real Money? A Historical Price Index for Use as a
Deflator of Money Values in the Economy of the United States: Addenda et Corrigenda
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How Much Is That in Real Money? A Historical Price Index for Use as a
Deflator of Money Values in the Economy of the United States
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Since the limitation was intended from the beginning and documented in the manual, it is not, strictly speaking, a
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HP-65 in original hard case with manuals, software "Standard Pac" of magnetic cards, soft leather case, and charger
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Steve
Wozniak sold his HP scientific calculator to partly fund the first batch of Apple 1 computers
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occur tends to a constant of around 4.6692... This "ratio of convergence" became known as the first
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Calculator with a magnetic storage card in the slit of the card reader on the side of the device
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printed on the slanted front surface of the key were accessed by pushing the gold
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565:"HP Virtual Museum: Hewlett-Packard-65 programmable pocket calculator, 1974"
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is the first magnetic card-programmable handheld calculator. Introduced by
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Internal rechargeable battery or 115/230 V AC, 5 W
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20:
703:
One of the HP-65s carried on the ASTP space flight is in the
497:, using the small HP-65 calculator he had been issued at the
425:) values, as well as polar/cartesian coordinate conversion.
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HP-65 display after result of test program from card reader
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16:
Programmable handheld calculator with magnetic card reader
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51:. Unsourced material may be challenged and removed.
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700:page at the unofficial Museum of HP Calculators
442:the key codes were shown without line numbers.
192:15 digits (decimal point uses one digit), (±10)
684:); includes a photograph of the magnetic card.
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417:conversions between degrees/minutes/seconds (
8:
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371:. For some mathematical functions, a gold
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680:at an unofficial Hewlett-Packard museum (
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300:(RPN) and a four-level automatic operand
111:Learn how and when to remove this message
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648:"Designing a Tiny Magnetic Card Reader"
627:"Consumer Price Index (estimate) 1800–"
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327:prefix key, respectively. For example,
1427:Computer-related introductions in 1974
269:height: 0.7–1.4 inches (18–36 mm)
122:
625:Federal Reserve Bank of Minneapolis.
7:
255:Calculator: 11 oz (310 g),
49:adding citations to reliable sources
335:would access the sine function, or
688:1975 HP Calculator Christmas Guide
383:would calculate the inverse sine (
14:
265:Length: 6.0 inches (150 mm),
257:recharger: 5 oz (140 g)
747:Hewlett-Packard (HP) calculators
226:8 (9) plus 4-level working stack
25:
646:Taggart, Robert B. (May 1974).
267:width: 3.2 inches (81 mm),
36:needs additional citations for
499:Los Alamos National Laboratory
1:
709:National Air and Space Museum
619:American Antiquarian Society
599:American Antiquarian Society
503:period-doubling bifurcations
1422:HP programmable calculators
1051:Scientific non-programmable
1443:
693:HP's Virtual Museum: HP-65
406:{\displaystyle \sin ^{-1}}
135:HP-65 keyboard and display
480:Apollo-Soyuz Test Project
128:
488:Apollo Guidance Computer
474:Significant applications
873:Scientific programmable
655:Hewlett-Packard Journal
298:Reverse Polish Notation
215:Programming language(s)
1162:Financial and business
517:
458:
438:
421:) and decimal degree (
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183:seven-segment display
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45:improve this article
507:Feigenbaum constant
495:Mitchell Feigenbaum
364:{\displaystyle 1/x}
125:
1394:Emulation software
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62: –
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56:Find sources:
50:
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40:
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34:This article
32:
28:
23:
22:
19:
1001:
658:. Retrieved
654:
641:
630:. Retrieved
610:
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579:
568:. Retrieved
559:
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477:
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460:
444:
440:
415:
379:followed by
339:followed by
331:followed by
317:
308:Bill Hewlett
306:
284:
282:
244:Power supply
189:Display size
175:Display type
145:Programmable
107:
98:
88:
81:
74:
67:
55:
43:Please help
38:verification
35:
18:
603:1700–1799:
583:1634–1699:
484:outer space
429:Programming
423:sexadecimal
419:sexagesimal
210:Programming
205:proprietary
1416:Categories
1339:OfficeCalc
705:collection
660:2019-05-01
632:2024-02-29
570:2011-01-29
551:References
262:Dimensions
170:key stroke
164:Entry mode
159:Calculator
151:Introduced
71:newspapers
1344:PrintCalc
1329:QuickCalc
678:The HP-65
521:Fun Facts
396:−
218:key codes
202:Processor
1334:EasyCalc
1194:Prestige
1189:Platinum
1063:6s Solar
756:Graphing
682:MyCalcDB
608:(1992).
588:(1997).
545:65 Notes
529:See also
323:or blue
314:Features
101:May 2023
1312:CalcPad
864:Xpander
707:of the
85:scholar
60:"HP-65"
1216:17bII+
1179:10bII+
252:Weight
87:
80:
73:
66:
58:
1375:FOCAL
1295:Other
1231:19BII
1211:17BII
1174:10bII
1153:300s+
1088:10sII
1037:9100B
1032:9100A
947:32SII
859:Prime
839:48gII
799:39gII
698:HP-65
651:(PDF)
615:(PDF)
595:(PDF)
540:HP-35
535:HP-25
448:HP-67
302:stack
285:HP-65
239:Other
124:HP-65
92:JSTOR
78:books
1148:300s
1083:10s+
1042:9805
987:41CX
982:41CV
849:49g+
834:48GX
829:48G+
819:48SX
809:40gs
794:39gs
789:39g+
293:MSRP
283:The
178:Red
154:1974
141:Type
64:news
1401:16C
1385:CAS
1380:ALG
1370:PPL
1365:RPL
1360:RPN
1322:200
1317:100
1266:38E
1261:38C
1256:37E
1251:30b
1236:20b
1226:19B
1221:18C
1206:17B
1201:14B
1184:12C
1169:10B
1123:32E
1118:31E
1113:30s
1108:27S
1098:22S
1078:10s
1027:97S
1017:95C
1012:71B
992:42S
977:41C
972:35s
967:34C
962:33s
957:33E
952:33C
942:32S
937:29C
932:25C
922:21S
917:20S
912:19C
907:16C
890:15C
885:11C
880:10C
854:50g
844:49G
824:48G
814:48S
804:40G
784:39G
779:38G
774:28S
769:28C
468:bug
413:).
392:sin
234:100
197:CPU
180:LED
168:RPN
47:by
1418::
1307:10
1302:01
1286:92
1281:81
1276:80
1271:70
1246:27
1241:22
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1103:27
1093:21
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1058:6s
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1002:65
997:55
927:25
900:CE
895:LE
764:9g
653:.
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377:f
373:f
359:x
355:/
351:1
341:4
337:g
333:4
329:f
325:g
321:f
114:)
108:(
103:)
99:(
89:·
82:·
75:·
68:·
41:.
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