What does NISO stand for?

What does NISO mean?

NISO	National Information Standards Organization Miscellaneous » Unclassified
NISO	National Information Standards Organization Community » Non-Profit Organizations
NISO	National Information Standards Organization Business » Professional Organizations
NISO	National Information Standards Organization Academic & Science » Universities
NISO	National Information Standards Organization Academic & Science » Libraries
NISO	National Information Standards Organization Business » General
NISO	Netherlands Industrial Space Organisation Miscellaneous » Unclassified