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Expensive Desk Calculator by Robert A. Wagner is thought to be computing's first interactive calculation program. [1] The software first ran on the TX-0 computer loaned to the Massachusetts Institute of Technology (MIT) by Lincoln Laboratory. It was ported to the PDP-1 donated to MIT in 1961 by Digital Equipment Corporation. [2]
Added applications and data files are stored in the internal battery-backed RAM; these can be loaded from and stored to an audio cassette tape recorder or external floppy disk drive. Optional ROMs can be installed in the Model 100, providing a range of customized application software. [13] Only one optional ROM can be installed at a time.
The DC100 tape cartridge format was used in the HP desktop calculator and computer systems of the late 1970s and early 1980s, including the 9815, 9825, [4] 9845, and HP Series 80. [6] HP also used it in their 2640 series of computer terminals. [ 7 ]
The files generated with digital recorders vary in size, depending on the manufacturer and the format the user chooses. The most common file formats that digital recorders generate have one of the extensions WAV, WMA and MP3. Many dictation machines record in the DSS and DS2 format. Dictation audio can be recorded in various audio file formats.
HP 9815A. Chronologically, the models of the family were: HP 9810A, a keystroke programmable computer with magnetic cards and LED display, introduced in 1971, [1]; HP 9820A, introduced in 1972, was the first HP model that deals with algebraic input (not only RPN) [2] featured a high level language simpler than BASIC that was later named high performance language (HPL),
Before Windows 7, Sound Recorder could save the recorded audio in waveform audio (.wav) container files.Sound Recorder could also open and play existing .wav files. To successfully open compressed .wav files in Sound Recorder, the audio codec used by the file must be installed in the Audio Compression Manager (ACM); Windows installations dating back to at least Windows 95 came with a selection ...
Top physicist says chatbots are just ‘glorified tape recorders,’ and predicts a different computing revolution is ahead Christiaan Hetzner August 14, 2023 at 9:09 AM
Earlier calculators needed a key, or key combination, for every available function. The HP-67 had three shift keys (gold "f", blue "g" and black "h" prefix keys); the competing Texas Instruments calculators had two (2nd and INV) and close to 50 keys (the TI-59 had 45). Hewlett-Packard were constrained by their one byte only instruction format.
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