| 1985 | - | TurboBasic 1.0 was published by Borland International. |
| ???? | - | Version 1.1 is published. This will be the last version that ships before it is discontinued: Borland sees no future for Basic. The rights of the program are transferred back to its creator, Bob Zale. |
| 1989 | - | With some minor updates, TurboBasic is published by Spectra Publishing, under the name PowerBasic 2.0. |
| ???? | - | Another minor update, to version 2.1. |
| 1993 | - | PowerBasic 3.0 is released by Bob Zale's own company: PowerBasic Inc. PB 3.0 was Capable of compiling to 386-opcodes, and featured an inline-assembler. Highly optimized, it speed of execution makes it a serious rival for "major league" programming languages like C++, while still providing you the ease-of-use of the BASIC language. |
| 1995 | - | Another update, to version 3.2. The most significant new feature in this release would be the c-style pointers |
| 1996 | - | PowerBasic 2.1 is re-released as shareware, under the name FirstBasic. (Initially PBasic, but changed after a trademark-conflict) |
| 1997 | - | PowerBasic 3.5 saw the light: currently the latest addition to the PB/DOS family. It's major new features: XMS-Support (Virtual Arrays), null-terminatred ASCIIZ-strings, STDIN/STDOUT. |
| - | Speed | : | Without a doubt, PB/DOS is the fastest DOS-based BASIC around. |
| - | Flexibility | : | Pointers, Inline ASM, EMS. |
| - | Compatibility | : | 99% compatible with QuickBasic: use your legacy code! |
| - | Support | : | Still actively supported by a healthy company |
