| Hardware | ||
| Tom's Hardware Guide | Computer hardware reviews and tips. | |
| Old Computers | Obsolete Technology | |
| Vintage Computers | Erik Klein's Vintage Computer Collection | |
| Series 80 | HP Series 80 Computers | |
| HP 85 Gummy Wheel Problem | Repair HP 85 tape transport wheel | |
| Software | ||
| Ask Tom | Oracle questions answered. | |
| CGI Resources | Thousands of pre-made CGI's written in Perl, C, C++, and other languages. Information, documentation and tutorials regarding CGI programming. | |
| ASCII Table | Table of ASCII codes. | |
| Code Weavers | Linux application that allows running of Widows Programs | |
| Tikiwiki | Tikiwiki is a full featured Free Software (GNU/LGPL) Wiki/CMS/Groupware written in PHP | |
| W3 Schools | Full Web Building Tutorials - All Free | |
| Calculators | ||
| HP Museum | The Museum of HP Calculators displays and describes Hewlett-Packard calculators introduced from 1968 to 1986 plus a few interesting later models. There are also sections on calculating machines and slide rules as well as sections for buying and selling HP calculators, an HP timeline, collecting information and a software library. | |
| HP41 | A site dedicated to documenting and preserving the amazing HP41 Calculator. Includes a great Windows software emulator of the HP41. | |
| Calculator Museum | Handheld, Desktops, and Pocket Computers | |
| RSKey | Programmable Calculators | |
| Slide Rule | ||
| Eric's Slide Rule Site | A site containing scans and descriptions of slide rules along with useful background information. | |
| Slide Rule Universe | All kinds of information about slide rules including lessons, maker's archives, links and an on-line marketplace and auction. | |
| Oughtred Society | A site dedicated to the history and collection of slide rules. Named for the founder of the modern slide rule - William Oughtred | |