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The HX-20 (also known as the HC-20) is an early laptop released by Seiko Epson in July 1982. It was the first notebook-sized portable computer, [4] [5] occupying roughly the footprint of an A4 notebook while being lightweight enough to hold comfortably with one hand at 1.6 kilograms (3.5 lb) and small enough to fit inside an average briefcase.
Epson, which is sometimes credited for being the first to market a notebook computer with the HX-20 in 1982, [2] introduced the ActionNote series in April 1993. [3] Development for the ActionNote was led by Sanford Weisman, portable computer product manager at Epson America, who was also instrumental in the design of the company's earlier NB series of laptops. [4]
Dot matrix printers are a type of impact printer that prints using a fixed number of pins or wires [2] [3] and typically use a print head that moves back and forth or in an up-and-down motion on the page and prints by impact, striking an ink-soaked cloth ribbon against the paper. They were also known as serial dot matrix printers. [4]
Memory prices later decreased significantly, while rapid improvements in the performance of PCs and peripheral cables (most importantly, SCSI) enabled the development of low-end laser printers which offload rasterization to the sending PC. For such printers, the operating system's print spooler renders the raw bitmap of each page into the PC's ...