31. Univac LARC transistorized supercomputer memory-read amplifier circuit board using Philco's surface-barrier transistors-1960 32. The G-20 system was a general purpose mainframe computer, constructed of transistorized modules and core memory. 33. Brooks believed that the future was in transistorized equipment, but SKL was still focused on vacuum tube technology. 34. The "'IBM 7080 "'is a transistorized version of the 705, with various improvements. 35. Between 1955 and 1964 Olivetti developed some of the first transistorized mainframe computer systems, such as the Elea 9003. 36. In 1955 the first completely transistorized calculator with magnetic cores for dynamic memory, the IBM 608, was introduced. 37. With the advent of the electronic, transistorized calculator in the 1970s, slide rules became obsolete for most uses. 38. Univac TRANSTEC " test " transistorized computer with plug-in logic circuit board using Philco surface-barrier transistors. 39. He designed the first transistorized radio-frequency coupled pacemaker in about 1960 in collaboration with Dr . Alexander Mauro. 40. He also uses vacuum-tube electronics, rather than transistorized equipment, in digitally mastering the tapes for compact disc.
