أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
for general idea you can check wikipedia.com DCS page, further details can be availed from various technical blogs sites. But if you are into particular DCS brand, then you can also check its company website.
I suggest that you have a look at the Honeywell company website eLearning section
( Honeywell Automation College )