| − | Sinclair Research originally provided a wide array of external devices for the Spectrum, especially since many models lacked the standard I/O ports. These included a minuscule thermal printer, network adapter and external high speed tape drives. In addition 3rd party manufacturers made numerous other devices and port adapters to allow use of disk drives, printers etc. | + | Sinclair Research originally provided a wide array of external devices for the Spectrum, especially since many models lacked the standard I/O ports. These included a miniscule thermal printer, network adapter and external high speed tape drives. In addition 3rd party manufacturers made numerous other devices and port adapters to allow use of disk drives, printers etc. |