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  2. Epson - Wikipedia

    en.wikipedia.org/wiki/Epson

    Epson has released a firmware patch to bring the R-D1 up to the full functionality of its successor, being the first digital camera manufacturer to make such an upgrade available for free. [citation needed] In September 2012, Epson introduced a printer called the Expression Premium XP-800 Small-in-One, with the ability to print wirelessly. [20]

  3. Epson MX-80 - Wikipedia

    en.wikipedia.org/wiki/Epson_MX-80

    In early 1978, the company introduced their first serial dot matrix printer, the TX-80. The product of only three months of development, the TX-80 was the first sub-US$2,000 dot matrix printer on the market. [1] [2] It was also Epson's first printer marketed in the United States.

  4. Epson PX-4 - Wikipedia

    en.wikipedia.org/wiki/Epson_PX-4

    The Epson PX-4 (HC-40 or HX-40) is a portable CP/M based computer introduced in 1985. The screen was 40×8 characters physical, but 80×25 or 40×50 virtual, [1] making it almost compatible with the Epson PX-8 Geneva. It could be operated from a Nickel-Cadium battery pack (Epson RB 105), 4xAA batteries, or a 6V 600mA DC power supply.

  5. 1951 USAF resolution test chart - Wikipedia

    en.wikipedia.org/wiki/1951_USAF_resolution_test...

    Glass chart. A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.

  6. Dot matrix printing - Wikipedia

    en.wikipedia.org/wiki/Dot_matrix_printing

    An Epson MX-80, a classic model that remained in use for many years. IBM sold it as their IBM 5152. [11] In 1968, the Japanese manufacturer OKI introduced its first serial impact dot matrix printer (SIDM), the OKI Wiredot. The printer supported a character generator for 128 characters with a print matrix of 7 × 5. It was aimed at governmental ...

  7. TRS-80 Model 100 - Wikipedia

    en.wikipedia.org/wiki/TRS-80_Model_100

    The TRS-80 Model 4's TRSDOS 6 operating system includes a utility called TAPE100 that uses the Model 4's cassette port to read and write tapes created by a Model 100, the data of which are stored in TRSDOS disk files. Also because TRSDOS 6 included a communications application (COMM/CMD), the Model 100 proved a popular "peripheral" for the ...

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