adjust wording

Author: vladak

history.tex

@@ -129,7 +129,7 @@
 \item If you are interested in UNIX history, see the ``u{}nix'' on Wikipedia and
 you will find lots of content just by clicking through.
 % http://minnie.tuhs.org/Seminars/Saving_Unix/sslides/ss-sslides.html
-\item UNIX was multiuser system (accounts with passwords) in 1973 with
+\item In 1973, UNIX was multiuser system (accounts with passwords) with
 multiprocessing support and process protection and paging. It had signals,
 pipes, hierarchical file system with mount points, file rights (user/group/other
 r/w/x), hard links, devices accessible as files. The kernel was written in C