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The HP-35 was the world's first scientific pocket calculator, introduced in 1972 by Hewlett-Packard. It used RPN, trigonometry, logarithms, and a 15-digit LED display. The HP-35 was discontinued in 1975 and replaced by the HP-45.
A radar beacon (racon) is a device that returns a distinctive signal when triggered by a radar, providing range, bearing and identification information. Learn about the principle of operation, the characteristics, the applications and the proposal for enhanced RACON.
The HP-45 is a classic scientific calculator introduced by Hewlett-Packard in 1973. It has a shift key, a hidden timer, and various functions such as trigonometry, logarithms, conversions, and statistics.
The Harvard Mark II, also known as the Aiken Relay Calculator, [1] [2] [3] was an electromechanical computer built under the direction of Howard Aiken at Harvard University, completed in 1947. It was financed by the United States Navy and used for ballistic calculations at Naval Proving Ground Dahlgren .
The TI-30 is a low-cost scientific calculator manufactured by Texas Instruments since 1976. It has various models with different displays, functions, and power sources, and is popular for math education and business use.
The EL-8 was much smaller, small enough to be used in one's hand: 164 mm (6.46 in) long, 102 mm (4.02 in) wide, and 70 mm (2.76 in) thick, and weighing 0.72 kg (1.59 lb) with batteries. [6] Although it was still too bulky to easily fit in a pocket, [1] it was an important step toward the development of the pocket calculator. [2]
HP-16C is a programmable pocket calculator for computer programmers, produced by Hewlett-Packard from 1982 to 1989. It has features such as hexadecimal display, word size, binary operations, and keystroke programming.
The Aurora X-65 CRANE is an experimental aircraft that uses bursts of air to control its flight. It is developed by DARPA and Aurora Flight Sciences as part of the CRANE programme, which aims to demonstrate the feasibility of Active Flow Control.