| ID | Name | Type |
|---|---|---|
| #23032 | Magick Word Software | P |
| #8921 | Magicom Inc | Z |
| #8922 | Magicsoft | Z |
| #8923 | Magination Software | Z |
| #8924 | Magnetic Fields | Z |
| #8925 | Magnetic Magazines Ltd | Z |
| #8926 | Magnetic Scrolls Ltd | Z |
| #8927 | Magnetik | - |
| #8928 | Magnificent 7 Software | Z |
| #8929 | Magnum Computing | M |
| #8930 | Magnum Electronics | Z |
| #8931 | Magnús Kristinn Jónsson | + |
| #17454 | Mail Order Software | S |
| #17455 | Mail-Centa | A |
| #17456 | Mail-Soft | S |
| #17457 | Mailsoft | S |
| #8932 | Maincomp | ? |
| #8933 | Maiolino | ? |
| #8935 | Major | ? |
| #8936 | Major Developments | Z |