Web access management products originated in the late 1990s, and were then known as single sign on.
About 20 different forms of single sign on have been solved, for over a decade.
But there was not a single sign of human life.
We saw not a single sign of any fun last year.
There were no lights showing, not a single sign or sound came to us.
"Al- low me a single sign that you remember your promises."
Janet came into the room and told me that there wasn't a single sign of cancer left in my body.
They had yet to see a single sign of life, present or past, upon the desert floor.
That is to be a plain, dark glass wall with a single sign for the hotel.
There's not a sound coming from the place, not a single sign of life.