Visible record books are used commonly in government offices, businesses, hospitals, schools, etc. in keeping records and information conveniently available for easy view. Used all over the world as a medical record book, because it's portable and the flip pockets are a quick and convenient method to check patients' charts. ACS durable record books are designed with quality to securely hold patient records, index cards, information cards, etc. Each pocket has pre-cut notches that will accommodate 3" x 5", 4" x 6" and 5" x 8" size cards. Multiple index card file has a clear plastic visible index tab on each pocket for quick reference.