Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Ruled paper (or, Lined paper) is writing paper that typically consists of horizontal lines meant to separate lines of hand-written text, and vertical lines meant to provide margins or to act as tab stops. A popular alternative to lined paper is graph paper. It is a grid layout in which horizontal and vertical lines are equally spaced, dividing the page into squares. There are many types of ruled paper. Lines are drawn on paper according to the needs of the users. Some types of ruled paper are for calligraphy, making graphs, or writing music, whereas others are for teaching students how to write in a particular language or script, etc. The type of ruling is not typically tied to any particular paper size. Instead, it is usually determined by the purpose, style of handwriting, and/or the language being written. Lines on ruled paper are typically used as guidelines to help the user keep their writing or drawing consistent with a predetermined set of rules.