This is a total n0-brainer. The third list is correct. Matthew da Silva The University of Sydney, NSW, 2006 ________________________________ From: austechwriter-bounce@xxxxxxxxxxxxx [mailto:austechwriter-bounce@xxxxxxxxxxxxx] On Behalf Of MHT Sent: Tuesday, 15 January 2008 6:44 AM To: austechwriter@xxxxxxxxxxxxx Subject: atw: in's or ins' or ins Greeting all, Which is correct (non-possessive): Check-up's Check-in's Built-in's Plug-in's Drop-in's Punch-in's or Check-ups' Check-ins' Built-ins' Plug-ins' Drop-ins' Punch-ins' or Check-ups Check-ins Built-ins Plug-ins Drop-ins Punch-ins Kind Regards, MHT