tell me the full form of ISD , STD & PCO?

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tell me the full form of ISD , STD & PCO?

2006-10-09 15:03:17 · 2 answers · asked by Nimisha P 1 in Education & Reference ➔ Home Schooling

2 answers

ISD - International Subscriber dialling

STD - Subscriber Trunk Dialling

PCO - Public Call Office

2006-10-09 22:51:30 · answer #1 · answered by preet 2 · 0⤊ 2⤋

This has already been asked and answered on this site. Here is the link with the best answer:
http://answers.yahoo.com/question/index?qid=20060816073149AAINmoZ

2006-10-09 22:12:05 · answer #2 · answered by misen55 7 · 0⤊ 1⤋