Hello, I'm a WinXP user building a server application to regularly insert records into a database. Because the size of the database will grow rapidly, I need to regularly prune records from it, and the only way I can find is by 'cron' (or the OS equivalent). I want my application to work in any environment, including every OS that I'm aware of. So do you know of any necessary Mac considerations related to the 'cron' command? For example... I read on dev.apple.com that OS X has a 'cron' command; is it the earliest release that does? How can I test (using PHP's 'php_uname' function) for Mac (and, if necessary, OS [version < 10])? Are there any syntax variations for 'cron'? Thanks!