~/.emacs" file:
(setq-default abbrev-mode t)
(cond ((file-exists-p "~/.abbrev_defs")
(read-abbrev-file "~/.abbrev_defs")))
(setq save-abbrevs t)
C-x
a i g" to create a global abbreviation ("C-x a
i l" for local abbreviations)
M-x write-abbrev-file"
~/.abbrev_defs" when prompted for
a name