Sentence:  Downloadable software can be provided in several different formats. Some automatically install themselves, but others require manual procedures. A downloadable file typically is set up as a self-installing executable file, <WSD>self-executing</WSD> zip file, ... 
Meaning of the word marked with <WSD> tags:  Consisting of a complete executable package that takes some action with the included data, rather than a pure data file requiring some additional tool to read it.