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.