This IBM AT Model 5170 was built in 1985. It was bought new by Appleby Castle. Along with software it cost £8000. That is £34,000 in 2018 money ($43,680). It was used in the accounting department.

It has 2x floppy drives, 1.2Mb and 360kb. This allowed both newer and older discs to work on the system. It also has a Seagate ST-4026 hard drive with 21Mb capacity (formatted). The machine has 256kb RAM and its Intel 80286 CPU runs at 6MHz.