Office SUPPLIES, which is basically where you COULD have recorded the computer, as long as it cost less than $2500. Safe Harbor de minimis rules allow direct expensing of certain hardgoods that are not permanently attached to or improve an actual building. Computers are portable, with the exception maybe of a 50 year old IBM 360. They do not have to be recorded as fixed assets and as such any later "improvements" are not to an asset but just for operations.