This content is 20 years old. I don't routinely update old blog posts as they are only intended to represent a view at a particular point in time. Please be warned that the information here may be out of date.
I recently came across a handy script which examines a Windows NT/2000/XP/2003 computer or an Active Directory domain controller to read out the last log on time for each user. By piping the output to a text file, it could be useful for sorting and identifying redundant user accounts.