Supplementary activites 19 By UxueAlfonso 1975 The IMB Portable PC 5100 1981 The Osborne 1 1982 The GRID Compass 1101 1983 The TRS-80 model 200 1983 Gavilan SC 1989 The Macintosh Portable 1991 The Macintosh Portable, smaller, light, cheaper 1999 The iBook 2025 MacBook