MemoryUsage

• MIT - The MIT license is like BSD without the advertising clause. As free as it gets, suitable for cross Smalltalk 100% reuse. The recommended license for Squeak since the 4.0 release.
• Squeak3.7 - Released 15 Sept 2004.
• Squeak3.8 - Released 25 May 2005.
• Simple filein - A '.st' or '.cs' (changeset) standard filein. Optionally gzipped with extra extension '.gz'.
• SqueakL - The original license of Squeak from Apple. Obsolete since Squeak 4.0 (which only accepts MIT contributions). SqueakL is not recommended to be used for new projects.
• Rock solid - Useable and hasn't had bugs for a long time.
• Squeak 4.4 - Released December, 2012
• Code changes, but only internal - Code has changed but should not affect external behavior.
• Squeak3.9-alpha - This is the now obsolete development version of 3.9.
• Code changes, but only bug fixes - Code has changed but only with bug fixes.
• Squeak4.5 - For release Q1/2014.

Tested in Squeak 4.5.