| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| Company | Phone Number | Comments |
| R Company | (213) 393-9992 | JAWS file compression utility |
| Racet Comp. Limited | (714) 579-1725 | |
| Radius, Inc. | (408) 434-1010 | |
| Radius, Inc. | (408) 434-1012 | Technical support |
| Ran-Ger Technologies | (612) 437-2233 | PB 1518DT monitor video driver |
| RasterOps | (801) 221-1129 | BBS |
| RealWorld Corp. | (800) 678-6336 | Technical support for RealWorld Accounting |
| Reference Software | (800) 872-9933 | Sales (Makers of Grammatik IV) |
| Reference Software | (415) 541-0222 | Main number |
| Reference Technology | (303) 449-4157 | Distributor of CD-ROM extensions for Hitachi |
| Reference Technology | CDR 1502S, Philips CM-100, Sony CDU-100 | |
| Relisys | (408) 945-1062 | |
| Retix | (213) 399-2200 | Retix X.400 OSI Mail System |
| Reuters Info. Services | (212) 603-3580 (800) 521-2471 |
Adv Reuter Terminal financial data system |
| Ribbons Inc. | (800) 742-2661 | Printer products for PB printers |
| Richard Young Journal | (800) 247-4918 | PB9815 Toner,Drum |
| Ricoh Corp. | (800) 227-4264 | Technical support |
| Ring Zero Systems | (415) 349-0600 | Ring Central Support |
| Rix SoftWorks Inc. | (800) 345-9059 | ColoRix VGA Paint |
| Rix SoftWorks Inc. | (800) 345-9059 | EGA Paint 2005 |
| Roland | (213) 685-5141 | Technical support/end user service |
| Rosesoft | (206) 562-0225 | ProKey for Windows |
| Rose Hill Systems | (800) 248-Rose | Rose 286, 386 mail order comp. |
| Roykore Software Inc. (RSI) | (415) 563-9175 | OPUS I hyperdrawing program |
