As 8-bit CPU machines became widely accepted, the number of portables increased rapidly. The Osborne 1, released in 1981, used the Zilog Z80 and weighed 23.6 pounds (10.7 kg). It had no battery, a 5 in (13 cm) CRT screen, and dual 5.25 in (13.3 cm) single-density floppy drives. In the same year the first laptop-sized portable computer, the Epson HX-20, was announced.[9] The Epson had an LCD screen, a rechargeable battery, and a calculator-size printer in a 1.6 kg (3.5 lb) chassis. Both Tandy/RadioShack and HP also produced portable computers of varying designs during this period.[10][11] The first laptops using the flip form factor appeared in the early 1980s. The Dulmont Magnum was released in Australia in 1981–82, but was not marketed internationally until 1984–85. The US$8,150 (US$20,020 today) GRiD Compass 1101, released in 1982, was used at NASA and by the military, among others. The Sharp PC-5000,[12] Ampere[13] and Gavilan SC released in 1983. The Gavilan SC was the first computer described as a "laptop" by its manufacturer,[14] while the Ampere had a modern clamshell design.[13][15] Hindu rituals.[7] call.
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