Abstract
Two computer programs are described; they can be used to simulate e.p.r. spectra of effective spin-1/2 systems in frozen aqueous samples. One program is written in BASIC and the other in FORTRAN IV. Both programs are deposited as a Supplementary Publication (SUP 50082; 27 pages) at the British Library Lending Division, Boston Spa, Wetherby, West Yorkshire LS23 7QB, U.K. References are given to the applications of these programs in biochemical work.