The HP-25 was a hand-held programmable scientific /engineering calculator made by Hewlett-Packard between early January 1975 and 1978. The HP-25 was introduced as a cheaper (US$ 195 [1] MSRP) alternative to the ground-breaking HP-67. Similar to the way the HP-55 was a cheaper alternative to the HP-65.

2018年10月13日 · The made in the USA HP25A is a single-action self-loading pistol with a compact design. The handle allows a full firing grip for most hands. The pistol weighs a solid 20 ounces. That is more than many 9mm or .38 caliber hideout pistols. The HP25A features a three-inch vent ribbed barrel. The sights are excellent for a pocket pistol.

HP-21 有 3 个芯片（ACT、Anode Driver + ROM、Cathode Driver），HP-25 有 5 个（一个额外的 ROM 和 RAM 芯片）。 ACT 是系统的核心。 它是一个完整的片上MCU，带有一个定序器（如在 C&T 电路中）和一个 ALU。 它需要 2 个电压：Vgg (-12V) 和 Vss (6V)。

Programs supplied included plotting, base conversions, simultaneous equations in two unknowns, mortgage loan, discounted cash flow, great circle navigation, Newton's method solution to f (x)=0, numerical integration, a random number generator, power curve fit, and games including a moon landing simulator. You could do a lot in 49 steps.

Phoenix arms model HP25A is a single action semi-auto .25 ACP pistol with a 9-round capacity magazine that provides a compact yet comfortable grip in a size of just 4.1 by 5.5 inches and a weight of 20 ounces.

It was one a series of calculators of this size that also included the HP-21, HP-22, HP-25C, HP-27, and HP-29C. The calculator has a tan plastic case with a black or dark brown keyboard and thirty rectangular plastic keys. Many keys take on different meanings if the gold "f" shift key or the blue "g" shift key is pressed.

Free download of a color scan of the English-language book 'HP-25 Owner's Handbook' by Hewlett-Packard, which is an owner's manual (user's guide, operating manual, owner handbook) for the HP-25 calculator.

2014年12月24日 · Phoenix Arms Model HP25A is a single action semi-auto .25 ACP pistol with a 9-round capacity magazine that provides a compact yet comfortable grip in a size of just 4.1 by 5.5 inches and a weight of 20 ounces.

2011年7月3日 · Here is the full schematic of a HP-25 (sorry the CAD version is late). There are 3 chips in the HP-21 (ACT , Anode Driver + ROM, Cathode Driver) and 5 in the HP-25 (one extra ROM and the RAM chip). The ACT is the heart of the system. It is a complete micro calculator on a chip, with a sequencer (as in the C&T circuit) and an ALU.

2021年8月2日 · HIGH-PERFORMANCE - The Fenix HP25R v2.0 headlamp emits up to 1600 lumen spotlight reaching 317 yards. You can also switch to a wide-angle floodlight, or an auxiliary red light to preserve the night vision. USB-C RECHARGEABLE - via its built-in USB-C charging port. Runs up to 400 hours on the lowest mode.

With the introduction of the HP-25--the lowest-priced Hewlett-Packard programmable pocket calculator--the speed and convenience of programming is now available to just about everyone who needs it. And if you deal with repetitive problems, you need it. A program, in this case, is a sequence of keystrokes used to solve a problem.

HP-21有3颗芯片（ACT、Anode Driver + ROM、Cathode Driver），HP-25有5颗（1个额外的ROM和RAM芯片）。 ACT 是系统的核心。 它是一个完整的芯片微型计算器，带有一个定序器（如在 C&T 电路中）和一个 ALU。 它需要 2 个电压：Vgg (-12V) 和 Vss (6V)。

Phoenix Arms .25 ACP pistols are compact handguns for personal protection. Get the Phoenix Arms HP25A, Raven, and more at Sportsman's Outdoor Superstore.

Free download of a color scan of the English-language book 'HP-25 Applications Programs' by Hewlett-Packard, which is an applications book for a software package for the HP-25 calculator.

Emulator of the HP-25, a scientific programmable RPN calculator with 49 steps and 8 registers. For Windows. No comments at this time. You must be logged in to add your own comment.

Free download of a grayscale scan of the English-language document 'Computational Analysis with the HP-25 Pocket Calculator' by Peter Henrici, which is a document for the HP-25 calculator.

2021年5月16日 · [Jan Rychter] really likes his multiple HP-25C calculators, but the original battery pack design is crude and outdated. No problem — he whips up a replacement using Fusion 360 to design an...