Checkbook is an electronic checkbook register. You enter transactions into Checkbook just as you would on your paper version. But instead of pulling out your calculator each month and struggling with the chore of balancing your checkbook, mark off the items in Checkbook that are shown on your monthly statement and Checkbook will calculate it for you. Without the learning curve of a complicated accounting program, you get the job done. In addition to many other features, Checkbook has the option of password protection.