| #13633 | Spectrum Club | Z |
| #17772 | Spectrum Computer Centres | H |
| #13634 | Spectrum Computer Info User Club | Z |
| #13635 | Spectrum Computer Stores | Z |
| #13636 | Spectrum Computing | Z |
| #13637 | Spectrum Discovery Club | Z |
| #13638 | Spectrum Electronics | H |
| #13639 | Spectrum Games Ltd | P |
| #13640 | Spectrum Holdings | Z |
| #17773 | Spectrum Hospital | R |
| #13641 | Spectrum Microbase | Z |
| #13642 | Spectrum Omega Software | Z |
| #13643 | Spectrum Pricing | Z |
| #17774 | Spectrum Program Assessment | M |
| #13644 | Spectrum Software | Z |
| #17775 | Spectrum Software Club | X |
| #17776 | Spectrum Software Exchange Group | X |
| #17777 | Spectrum Software Library | X |
| #13645 | Spectrum Unemployed Users Group | Z |
| #13646 | Spectrum User | Z |