Monica S. Lam Leslie Lamport - algorithms for distributed computing, LaTeX. Butler W. Lampson Peter J. Landin Tom Lane (computer scientist) Börje Langefors Joshua Lederberg Manny M Lehman - Laws of Software Evolution Charles E. Leiserson - cache-oblivious algorithms, provably good work-stealing, coauthor of Introduction to Algorithms Douglas Lenat - artificial intelligence, Cyc Rasmus Lerdorf - PHP Leonid Levin - computational complexity theory J.C.R. Licklider David Liddle John Lions - Lions Book Richard J. Lipton - computational complexity theory Barbara Liskov - programming languages Ada Lovelace - first programmer Nancy Lynch