Version 1.2.1 - Fixed a test that could (and did) fail when the R platform is overloaded. Version 1.2 - Renamed List to StackList and updated docs. Version 1.1 - Exporting Stack and List. - Using a local package environment instead of baseenv() to store timing data. - Exporting the callback return message in tic.log. - Added tests. - Updated documentation formatting. - Updated maintainer contact and package location - this didn't work in the v1.0.1 submission. Version 1.0.1 - Updated maintainer contact and package location. Version 1.0 - First public release.