The Laser is a pretty perfect clone of the //c. I have no idea what they shipped with, but in elementary school we had them for half the lab. We just used standard DOS 3.3 or ProDOS disks in them when we needed the O/S. They have (AFAIK) the AppleSoft(like) basic in ROM (there may be some cross-polination with the IIgs machines that started trickling in and I used for more serious programming), so you can throw on one of the serial image download programs.