| Apple II 5.25 disk |  Nitemapper | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | Nitemapper | 198? | Zephyr Services Pittsburgh, PA, USA |
| Commodore C64 disk | Nitemapper | 198? | Zephyr Services Pittsburgh, PA, USA |
| Apple II 5.25 disk | Numerscope | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | Numerscope | 198? | Zephyr Services Pittsburgh, PA, USA |
| Apple II 5.25 disk | Oracle-East | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | Oracle-East | 198? | Zephyr Services Pittsburgh, PA, USA |
| Apple II 5.25 disk | Physicalc | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | Physicalc | 198? | Zephyr Services Pittsburgh, PA, USA |
| Apple II 5.25 disk | Shop-Aid | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | Shop-Aid | 198? | Zephyr Services Pittsburgh, PA, USA |
| Apple II 5.25 disk | StatCalc | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | StatCalc | 198? | Zephyr Services Pittsburgh, PA, USA |
| Apple II 5.25 disk | Stockfolio | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | Stockfolio | 198? | Zephyr Services Pittsburgh, PA, USA |
| Apple II 5.25 disk | Suntracker | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | Suntracker | 198? | Zephyr Services Pittsburgh, PA, USA |
| Apple II 5.25 disk | Supercat | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | Supercat | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | TideMaster | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | Time-Machine | 198? | Zephyr Services Pittsburgh, PA, USA |
| Apple II 5.25 disk | Vocabulator | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | Vocabulator | 198? | Zephyr Services Pittsburgh, PA, USA |
| Apple II 5.25 disk | Worlddisk | 198? | Zephyr Services Pittsburgh, PA, USA |
| IBM PC 5.25in. disk | Worlddisk | 198? | Zephyr Services Pittsburgh, PA, USA |
