A Bosnian company named IRIS Computers (subsidiary of an electric company in Bosnia and Herzegovina and Yugoslavia ENERGOINVEST) produced Apple II clones starting in the early 1980s. Their official brand name was IRIS 8. They were very expensive and hard to obtain and were produced primarily for use in early computerized digital telephone systems and for education. Their use in offices of state companies, R&D labs and in the Yugoslav army was also reported. IRIS 8 machines looked like early IBM PCs, with a separate central unit accompanied by a cooling system and two 5.25-inch disks, monitor, and keyboard. Compatibility with the original Apple II was complete. Elite high schools in Yugoslavia and especially Bosnia and Herzegovina were equipped with clusters of 8, 16, or 32 IRIS 8 computers connected in a local network administrated by an IRIS 16 PC clone. The number of IRIS 8s produced is believed to be on the order of 10 or 20 thousand.