Server and client requirements
Low client and server base requirements are core features that keep TWiki widely deployable, particularly across a range of browser platforms and versions. Many Plugins and contrib modules exist which enhance and expand TWiki's capabilities; they may have additional requirements.
TWiki is written in Perl 5, uses a number of shell commands, and requires RCS (Revision Control System), a GNU Free Software package. TWiki is developed in a basic Linux/Apache environment. It also works with Microsoft Windows, and should have no problem on any other platform that meets the requirements.
5.7 or higher (including GNU diff) Optional, TWiki includes a pure perl implementation of RCS that can be used instead (although it's slower)
GNU diff
GNU diff 2.7 or higher is required when not using the all-Perl RcsLite. Install on PATH if not included with RCS (check version with diff -v) Must be the version used by RCS, to avoid problems with binary attachments - RCS may have hard-coded path to diff
CSS and Javascript are used in most skins, although there is a low-fat skin (Classic skin) available that minimises these requirements. Some skins will require more recent releases of browsers. The default skin (Pattern) is tested on IE 6, Safari, and Mozilla 5.0 based browsers (such as Firefox).
You can easily select a balance of browser capability versus look and feel. Try the installed skins at TWikiSkinBrowser and more at TWiki:Plugins.SkinPackage.
Important note about TWiki Plugins
Plugins can require just about anything - browser-specific functions, stylesheets (CSS), Java applets, cookies, specific Perl modules,... - check the individual Plugin specs.