Need to count features?

Back in the old days we would use a counter such as this.

Use the knob at the top to set the counter to zero. Then click, press down, on each feature in a photo. Counter incremented with each push. You'd know it was counted and don't count again because a hole would be punched in it. Good idea to do this on a wood board or layers of shirt cardboard. "Shirt cardboard"? Shirts from the cleaners would be folded around a piece of cardboard. My how times change!

(and on flickr at https://www.flickr.com/photos/mcammer/28318913992/)

But maybe times haven't changed so much: New click to count.