Just putting dead or obsolete computers into the general garbage stream isn't a good idea, as it adds to landfill and prevents the recycling of useful materials.
You're lucky if you get kerbside recycling of such items more than once a year, and it isn't unusual for a charge to be levied if you take the scrap gear to a recycling centre.
So it's worth supporting events such as the Dell/ANU community recycling day, which will be held on Saturday October 17 at the ANU car park opposite Old Canberra House, Lennox Crossing.
Old computer equipment of any brand - but nothing else - will be accepted for recycling. Even cables and ink cartridges can be recycled.
The 2007 event in Canberra collected 35 tonnes of e-waste, more than at any other Dell recycling day in Australia. In all, such days have recovered over 140 tonnes of equipment.