A colorful coverpage conceptually demonstrates the multivendor capability of the new 8550 Microcomputer Lab. The 8550 supports a multiplicity of devices, 26 at present, and more in the near future. Other pros of the 8550 are due to two new hard copy units featuring low-cost, high-contrast copies, programmable calibration generator that speeds instrument checkout, slewed-edge signals that simplify fast sweep timing. Rear cover page includes photographs and text for a New Pulse Generator for the TM 500 Series.