I also include the program name (from $0) and the hostname, just in case I decide later on to spread out the program to multiple machines. In my case, I write to logfiles, and it is necessary to see on what machine a program was launched, and which program (or under which name).

Other than these two items, no other attributes come to mind.

In reply to Re: Generate a unique ID by Corion
in thread Generate a unique ID by BrowserUk

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