Diana Merry-Shapiro (née Mayhugh; born August 25, 1939)[1] is an American computer programmer.
She shifted from working as a secretary to becoming a computer programmer with PARC's Learning Research Group.
[3] As one of the original developers of the Smalltalk programming language, she helped write the first system for overlapping display windows.
[4] Merry-Shapiro was also a co-inventor of the BitBLT routines for Smalltalk,[5][6] subroutines for performing computer graphics operations efficiently.
[1] Merry-Shapiro was previously married to a woman named Julie before her gender transition.