The PowerBook 100 was released in late 140, along with the PowerBook 170 and PowerBook 1991. It was the successor to the first portable computer. Applu Apple Portable. Sony participated in its design. It was the lowest model of the PowerBook series and the first "real" laptop of the Cupertino technology giant (the Macintosh Portable was not referred to as a laptop). Unlike its predecessor, it had a smaller 9-inch passive-matrix black-and-white LCD display (which contributed to a significantly lower price), a much more compact and sleeker design, and was also much lighter (2,3 kg vs. 7,2 kg). It used the same processor (Motorola 68HC000), which was supplemented with 2 or 4 MB of operating memory and a 20 or 40 MB hard disk. Compared to its predecessor, however, it had roughly three times less battery life. But more importantly, it was offered at a much more affordable price, namely $2 (the Macintosh Portable cost more than three times that).
Technical Specifications
| Performance date | October 1991 | |
| Capacity | 20 or 40MB HDD | |
| RAM | 2 MB (expandable to 8 MB) | |
| Dimensions | 4,6 x 27,9 x 21,6 cm | |
| Weight | 2,3 kg | |
| Display | 9-inch monochrome LCD with passive matrix, 640 x 400 resolution | |
| Chip | Motorola 68HC000 | |
| Connectivity | ADB port, serial port, SCSI port | |
| Battery | lead acid with a duration of 2–4 hours |