TYPO3 is available in various “packages” and within each package normally a .zip or .tgz distribution (targeted at Windows- and Unix-server users respectively).
Here are some examples:
typo3_srcThis is the source files of the TYPO3 CMF which is mandatory in all TYPO3 systems. This is how the files might be named:
typo3_src-3.6.0.tgz(Contains “symlinks”, so download only for Unix servers where you are able to create symlinks!)
typo3_src-3.6.0.zip(This is the the safe-bet to download if the tgz-file is not your cup of tea. Works on both Unix and Windows servers, but contains a lot of redundant files.)
testsiteThe testsite is a “complete site” with a lot of default content for testing and learning. It's advisable to download the testsite to test TYPO3. This is how the filenames might be:
testsite-3.6.0.zip(This is both the source and site-specific files and is ready to upload, unzip and run out-of-the-box! Please try this if you are a newbee! Can be used on both Unix and Windows servers)
testsite-3.6.0.tgz(This does not contain the source files but only symlinks to the source following the generally recommended practice of symlinks. This is for experienced TYPO3 users only.)