Hello Matthew, Wednesday, December 07, 2005, 5:28:42 AM, you wrote: MMM> I have some program data that I'd like to persist. I could just there is 3 binary serialization packages for GHC: 1) GhcBinary, which is most widely used (including GHC compiler itself) and is close to be "standard de-facto" 2) SerTH (http://www.cs.helsinki.fi/u/ekarttun/SerTH/SerTH-0.2.tar.gz), which unique seling points are serialization of cyclic datastructures and automatic derivation of serialization code for your data types using Template Haskell 3) my own ByteStream (http://freearc.narod.ru), which is oriented toward fast working and using non-trivial i/o methods (in my own program serialized data are sent to another thread which compress them with gzip-like algorithm) is it what you asked for? -- Best regards, Bulat mailto:bulatz@HotPOP.com