Software (Customising or adaptation of …) Problem statement: What exactly is the border/difference between customising of software (62.01) and adaptation of non-customised software in 58.29? Solution: Adaptation work for software as main activity should be classified in NACE Rev. 2 class 62.01. Publishing of software as main activity in NACE Rev. 2 class 58.29. The adaptation of software by publisher on own account is publishers second activity and should be treated according to general classification rules for multiple activities. Usually the main activity remains publishing. Decision date: 01.07.2007