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In portable computers (such as laptops) there is usually an external power supply (sometimes referred to as a "power brick" due to its similarity, in size, shape and weight, to a real brick) which converts AC power to one DC voltage (most commonly 19 V), and further DC-DC conversion occurs within the laptop to supply the various DC voltages ...
A panel mount computer monitor is intended for mounting into a flat surface with the front of the display unit protruding just slightly. They may also be mounted to the rear of the panel. A flange is provided around the screen, sides, top and bottom, to allow mounting. This contrasts with a rack mount display where the flanges are only on the ...
Some of their early uses were in embedded systems, notably used by NASA for the Apollo Guidance Computer, by the military in the LGM-30 Minuteman intercontinental ballistic missile, the Honeywell ALERT airborne computer, [20] [21] and in the Central Air Data Computer used for flight control in the US Navy's F-14A Tomcat fighter jet.
The Digital logo was used up until 2004, even after the company ceased to exist, as the logo of Digital GlobalSoft, an IT services company in India (which was a 51% subsidiary of Compaq). Digital GlobalSoft was later renamed "HP GlobalSoft" (also known as the "HP Global Delivery India Center" or HP GDIC), and no longer uses the Digital logo.
The war of the currents was a series of events surrounding the introduction of competing electric power transmission systems in the late 1880s and early 1890s. It grew out of two lighting systems developed in the late 1870s and early 1880s; arc lamp street lighting running on high-voltage alternating current (AC), and large-scale low-voltage direct current (DC) indoor incandescent lighting ...
The ECL circuitry utilized DC voltages of +0 and -2 volts, with the CAU requiring four 50 amp -2 volt power supplies. Power was 400 Hz, to reduce large scale DC power supplies. The 400 Hz power was supplied by a motor/alternator, because even though solid state 400 Hz inverters were available, they were not considered reliable enough to meet ...
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HP Vectra was a line of business-oriented personal computers manufactured by Hewlett-Packard (now HP Inc.). It was introduced in October 1985 as HP's first IBM-compatible PC. [1] Hewlett-Packard, which originally made its name through selling test equipment, made its move into the computing field in 1967 with HP 1000/2100 minicomputers.