Since 1952, TOPS has provided quality products and services to businesses throughout the world. TOPS continues that commitment providing innovative, high quality value-added paper products for the office, school and home. TOPS Computation Notebooks are designed to help document projects and work in progress in a range of subjects, such as Chemistry, Math, Science, and Engineering. The TOPS Computation Notebook is ideal for recording data and making calculations. These books contain 78 sheets and 156 numbered pages, as well as quadrille ruling with 4 squares per inch on both front and back and top and side margins for note taking. A sturdy cover and sewn page construction protect your important data, while the green tinted paper reduces eyestrain. Whether it"s a multi-part form, notebooks, writing pads, record books, or any of the hundreds of items we offer, you can count on TOPS products to help!