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X Open Co
**O.C.**
ยท
X OPEN
title
ISBN-13
(ISBN-10)
year of publication
Api to Electronic Mail
978-0-13-353517-4
(0-13-353517-7)
1995
X/Open Transport Interface , Version 2
978-0-13-353459-7
(0-13-353459-6)
1995
X/OPEN Company