However, with the development of mass market software for the new age of microcomputers in the 1980s came new forms of software distribution first cartridges, then Compact Cassettes, then floppy disks, then (in the 1990s and later) optical media, the internet and flash drives. This meant that software deployment could be left to the customer. However, it was also increasingly recognized over time that configuration of the software by the customer was important and that this should ideally have a user-friendly interface (rather than, for example, requiring the customer to edit registry entries on Windows).