Corporation as "producing computers packaged in tin cans". Others raved about its value, as the company advertised the Kaypro II as "the computer that sells for ", some noting that the included software bundle had a retail value over by itself, and by mid-1983 the company was selling more than 10,000 units a month, briefly making it the fifth-largest computer maker in the world. It managed to correct most of the Osborne 1's deficiencies: the screen was larger and showed more characters at once, the floppy drives stored over twice as much data, the case was more attractive-looking, and it was also much better-built and more reliable. Grid Compass The Grid Compass ran its own operating system, GRiD-OS. Its specialized software and high price (US$8,000–10,000) meant that it was limited to specialized applications. The main buyer was the U.S. government. NASA used it on the Space Shuttle during the early 1980s, as it was powerful, lightweight, and compact. The military Special Forces also purchased the machine, as it could be used by paratroopers in combat. Post-IBM PC portables Compaq Portable and competitors Although Columbia Data Product's MPC 1600, "Multi Personal Computer" came out in June 1983, one of the first extensively IBM PC compatible computers was the Compaq Portable. Eagle Computer then came out with their offering. and Corona Data Systems's PPC-400., the "portable" Hyperion Computer System. Both Eagle Computer and Columbia were sued by IBM for copyright infringement of its BIOS. They settled and were forced to halt production. Neither the Columbia nor the Eagle were nearly as IBM PC DOS compatible as Compaq's offerings. Commodore SX-64 The first full-color portable computer was the Commodore SX-64 in January 1984.. Atari STacy Originally announced in 1987, the Atari STacy was released to the public in December 1989 and was one of the first laptop-like portables. Apple Macintosh Apple Inc. introduced and released the Macintosh Portable in 1989, though this device came with a battery, which added to its substantial weight. The Portable has features similar to the Atari STacy, include integrated trackball and clamshell case. IBM PS/2 Portable After release of IBM PC Convertible in 1986, IBM still produced classic portable computers, include released in 1989 PS/2 P70 (with upgrade in 1990 to P75), and IBM produce portables for up to release of PS/2 Note and PS/55note notebook lines. Modern portables In today's world of laptops, smart phones, and tablets,