| ID | Name | Type |
|---|---|---|
| #1746 | Blade Software Ltd | Z |
| #1747 | Blakelow Software | Z |
| #1748 | Blanchard Smith | ? |
| #1749 | Blandford Press Ltd | Z |
| #1750 | Blane Bramble | ? |
| #19020 | Blane [Bearsden Primary 2019] | + |
| #1751 | Blayd | ? |
| #18059 | Blerkotron | - |
| #18490 | Blerkotronic Software | Z |
| #1752 | Blindmouse Ltd | Z |
| #1753 | Blitter Animations | Z |
| #1754 | Block-Byte Computing | Z |
| #19773 | Blood | - |
| #18158 | BloodBaz | - |
| #1755 | Bloody Skull Entertainment | Z |
| #1756 | Blue Alpha Electronics | Z |
| #19485 | Blue Bilby | P |
| #17080 | Blue Chip Computers | S |
| #20844 | Blue Monster | - |
| #1757 | Blue Ribbon Software | Z |