Sarah, Note that Tim asked for International standards, while ANSI is purely a US focused standards group. The unfortunate and quick answer to Tim's question
I just attended the Human Factors and Ergonomics Society's (HFES) annual meeting, and learned that there is an ANSI/HFES standard (#200), that includes a
To the extent that callers, and nearly any participant in a conversation, know the difference between not answering a question and attempting to answer, then
Tim, "Standard" here can only mean "what application creators want to agree to". Which is irrelevant, as you allude to about the ISO spec, because what is