This is one in a series of SMSG supplementary and enrichment pamphlets for high school students. This series makes available expository articles which appeared in a variety of mathematical periodicals. Topics covered include: (1) the latest about pi; (2) a series useful in the computation of pi; (3) an ENIAC determination of pi and e to more than 2,000 decimal places; (4) the evolution of extended decimal approximations to pi; and (5) the calculation of pi to 100,265 decimal places. (MP)