A Rapid Method for Digital Filtering Since much of the computer time spent in time-series analysis is used for multiplications, a minimum multiplication method was devised for digital filtering, with the expectation that it would be useful in the on line, real-time analysis of biological data. The filters are constructed from a succession of readily analyzable components in a manner that facilitates cascading. The repertoire of frequency response curves includes relatively good low-pass and band-pass designs. Programs are available for implementing both the synthesis of these filters, and their application on computers whose assemblers allow the definition of recursive macros. CACM September, 1964 Whittlesey, J. R. B. CA640909 JB March 9, 1978 5:03 PM 1002 5 1002 1002 5 1002 1002 5 1002