called the UNIVAC 1219 (known as the "Mk 152 Fire Control Computer.") It was part of the Navy's Mk 76 missile fire control system, used to control the AN/SPG-55 radar system. UNIVAC 418-III The first UNIVAC 418-III was delivered in 1969. It was available with 32,768 to 131,072 words of memory. Memory cycle time was reduced to 750 nanoseconds. New instructions were added for floating-point arithmetic, binary-to-decimal and decimal-to-binary conversions, and block transfers up to 64 words. The SR register was expanded to 6 bits. The 418-III had two unique hardware features which enabled it to handle continuously high speed serial character streams. One was called the buffer overflow interrupt and the other hardware buffer chaining. By the 1990s, all the 418 hardware was gone, but the California Department of Water Resources was still running 418 emulation on a UNIVAC 1100/60. References External links UNIVAC 418 documents on bitsavers.org UNIVAC 1218 Military Computer 1964 BRL report from Aberdeen Proving Grounds The Automated Weather Network The USAF creates a real-time network of UNIVAC 418s 18-bit Computers - Computer Unit Tester, 1218 (CP-789), AN/UYK-5 Moonbeam, 1219B-CP-848/UYK , CP-914, ILAAS, 1819, AN/UYK-11(V) Article about the Univac 1219 and its use in the Navy's Tartar Missile System Design of the real-time executive for the Univac 418 system The Univac 1218 at the System Source Computer Museum 418 Military electronics of the United States Transistorized computers 18-bit computers