 | |
 Sharp PC-4521 | |
| Developer | |
|---|---|
| Manufacturer | Sharp Corporation |
| Type | Laptop |
| Release date | September 1987 |
| Units shipped | Over 26,000 |
| Media | 3.5-inch floppy disk |
| Operating system | MS-DOS 2.11 or 3.21 |
| CPU | NEC V40 at 4.77/7.16 MHz |
| Memory | 640 KB |
| Storage | 20 MB hard disk drive (optional) |
| Removable storage | 768 KB ROM card (optional) |
| Display | Monochrome STN LCD |
| Graphics | CGA, 640 × 200 px |
| Dimensions | 12.2 by 3 by 13.7 inches (31.0 cm × 7.6 cm × 34.8 cm) |
| Mass | 12.77 pounds (5.79 kg) |
| Predecessor | Sharp PC-7000 |
| Successor | Sharp PC-4600 |
The Sharp PC-4500 is a line of laptop computers released by Sharp Corporation in 1987. The line comprises the PC-4501, the PC-4502, and the PC-4521. The PC-4501 is a bare-bones unit with only 256 KB of RAM stock, only one floppy drive, no backlighting, and no built-in numeric keypad; the PC-4502 and PC-4521 bumps the stock RAM to 640 KB and includes the latter two features while providing either two floppy drive (PC-4502) or one floppy drive and a 20 MB hard drive (PC-4521). Prices on the line initially ranged from $1,295 to just under $3,000; the PC-4501 was later sold for $995, becoming one of the first sub-$1,000 laptops available on the market. The PC-4500 line received mixed, mostly positive, reviews on its release in September 1987.