Connections
Bell Labs
Entity
typesetting
Entity
Douglas McIlroy
Entity
Q2666693
Entity
operating system
Entity
International Standard Book Number
Entity
Q11368
Entity
computer program
Entity
digital object identifier
Entity
Dennis M. Ritchie
Entity
typography
Entity
word processor
Entity
programmer
Entity
markup language
Entity
Q1107006
Entity
Unix-like operating system
Entity
Q739186
Entity
BCPL
Entity
command
Entity
PDP-11
Entity