Software, Reference, Mathematics 

X Window System, the complete Reference conforms to Release 5 and is four books in one!* Part I, Xlib - C Language X Interface, describes the lowest level C language X programming interface to the X Window System. Essential for all X programmers, even those using higher level toolkits such as X Toolkit Intrinsics. * Part II, X Window System Protocol, details the precise specification of the X protocol semantics. * Part III, Inter-Client Communications Conventions Manual, discusses the conventions that govern X inter-client communication. * Part IV, X Logical Font Description, describes the conventions for font names and font properties in the X Window System. Written by the experts who originally designed and created the X Window System, this Third Edition is a major revision of the definitive reference describing each standard specification from the MIT X Consortium. It conforms to the latest release: XVersion 11, Release 5. With this latest edition in hand, software developers and others can now take advantage of the significant new functionality in Release 5. And, in addition to fully integrating the important new features of this latest release, the original text has been significantly revised for clarity and easier access. Instructive diagrams, a detailed glossary, and a comprehensive subject-oriented index further enhance the book's overall value. - from Amzon