V2Cloud Solutions – How to Automatically Log Off Idle Users in Windows for Enhanced Security

Microsoft – Microsoft network server: Amount of idle time required before suspending session

InfoWorld – Manage those Macs: A guide for Windows admins / Set your Mac to log out when not in use

Apple – Set your Mac to log out when not in use

Linux / UNIX Automatically Logout BASH / TCSH / SSH Users After a Period of Inactivity

Microsoft – Security Options