 Normally the teletypes were not available Teletype Corporation typically sold them only to large commercial customers, which led to a thriving market for broken-down machines that could be repaired and sold into the microcomputer market.Ed Roberts, who had developed the Altair, eventually arranged a deal with Teletype to supply refurbished Model 33s to MITS customers who had bought an Altair.Les Solomon, whose "Popular Electronics" magazine launched the Altair, felt a low-cost smart terminal would be highly desirable in the rapidly expanding microcomputer market.