Sinclair ZX Spectrum 128 +3
It incorporated a 3" disk drive and a disk operating system, +3DOS, in ROM.
Technical specifications of computer Sinclair ZX Spectrum 128 +3
Manufactured by: Sinclair
Launched: 1988
Manufactured in 
United Kingdom
CPU: Zilog Z80
@ 3.54MHz
Memory: 128 KB
Support: Diskette 3"
Hard drive:
None
Operating system: BASIC
