31.   None, however, turns out to be as easy as using the mouse for the same task.

32.   OS X is based on a variant of the high-powered Unix operating system, and Unix computers normally use mice with two or three buttons.

33.   Sit down with her and demonstrate using the mouse.

34.   Some of them have arthritic fingers and cannot easily use the mouse, but are able to use the keyboard.

35.   Stanfield says he came up with the design when he was tinkering with ways to cut down on his own arm and hand fatigue while using the mouse.

36.   That can make it difficult to use a mouse, which operates in a plane different from the plane of the computer screen.

37.   The AOL software also forces people to use a mouse to go from feature to feature on the screen.

38.   The laboratory mice will be used for testing potential treatments.

39.   The scientists used mice that have a tendency to develop asthmatic symptoms.

40.   The taxpayer uses the computer keyboard to enter figures, names and addresses, and uses the mouse to pick answers from multiple choice lists.