Stumped by a 1970 patent? Solve the crossword with this clue!

Once upon a time, there was an inventor named Doug. Doug was tired of struggling with his computer keyboard, trying to move the cursor around on the screen. He knew there had to be a better way. One day, while eating lunch, he was watching a group of mice scurrying around outside. Suddenly, a lightbulb went off in his head.

Doug realized the movements of the mice were smooth and precise. He thought, “What if I could create a device that would mimic those movements and allow me to manipulate the cursor on my computer screen?” So, he got to work.

After many months of tinkering and testing, Doug finally invented a small handheld device that he called a “mouse.” It had a ball on the bottom and two buttons on top that created an X-Y position for the cursor on the computer screen. It was a breakthrough invention, and in 1970 Doug patented it as an “X-Y position indicator for a display system.”

The mouse was an instant sensation and became a staple for computer users around the world. Anytime someone wants to effortlessly and accurately move a cursor on a computer screen they use a “mouse.” Doug’s invention has changed the way we work and given us a nifty new word to throw into our crossword puzzles. The end.