Comment Consider the IBM Power Systems (Score 1) 257
Consider the IBM Power Systems, formerly known as the IBM System i, AS/400 and eServer iSeries.
The systems in these product lines are intended to be in use indefinitely with a completely compatible upgrade path. The operating systems and the software used on these servers are based on an architecture that has been in continuous use since 1979, the System/38, and the software that runs on these systems has been in use even earlier than that.