Lesson in application interface design
In the sneak preview for OS X Leopard, Apple unveiled a backup system called Time Machine. Going from the preview, it’s shaping up to be another exemplar product from the Cupertino giant. Interacting with Time Machine is intuitive and integration with Finder means that users will not have to relearn another set of skills or terminology.
Software developers who make use of version control systems(if you are develop software and DO NOT have VCS for your projects, starting using it NOW.) would find how Time Machine performs its backups vaguely familiar. Backups are performed incrementally and built on top of the previous revision. This usually saves disk space as only the parts that changed between revisions are stored.
Users simply fire up Time Machine from Finder and use a stylish 3D interface to browse their system backups using time as a familiar metaphor. Once they find what what they want, select the files or folders to restore, and voila! Your content is resurrected from the past.
Brilliant.