L
- Monica S. Lam
- Leslie Lamport – algorithms for distributed computing, LaTeX
- Butler W. Lampson
- Peter J. Landin
- Tom Lane
- Börje Langefors
- Edward D. Lazowska
- 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
- Yann LeCun
- Rasmus Lerdorf – PHP
- Max Levchin – Gausebeck-Lechin Test and PayPal
- 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
- Diane R. Litman – planning, natural language processing
- Ada Lovelace – first programmer
- Nancy Lynch
Read more about this topic: List Of Computer Scientists