During the run of Computer Chronicles thus far, IBM launched a number of products that failed to dominate their respective markets, including the PCjr, TopView, and token ring. But that didn’t stop Big Blue from trying to recapture its early PC glory days. This next Chronicles episode from October 1986 demonstrated yet another stumble in the form of the IBM RT PC, which despite the name was not part of its personal computer line, but rather an experimental minicomputer/microcomputer hybrid based on an architectural approach known as RISC.