7BITSTR
From SimsWiki
String encoding format used in The Sims and The Sims2.
The length of the string is Encoded 7 bits at a time before the string.
If you use .NET for developing you can simply read those 7-Bit length encoded Strings with the builtin readString() Method of the BinaryReader Stream.
This article is imported from the old MTS2 wiki. It's original page, with comments, can be found at http://old_wiki.modthesims2.com/7BITSTR