**The X Windows System:** - [Volume 0: X Protocol Reference Manual](/works/OL4347519W/) - [Volume 1: Xlib Programming Manual](/works/OL4347525W/) - [Volume 2: Xlib Reference Manual](/works/OL19371049W/) - [Volume 3: X Window System User’s Guide](/works/OL2158084W/) - [Volume 4: X Toolkit Intrinsics Programming Manual](/works/OL8272931W/) - [Volume 5: X Toolkit Intrinsics Reference Manual](/works/OL18304438W/) - [Volume 6: Motif Programming Manual](/works/OL3862243W/) - [Volume 7a: XView Programming Manual](/works/OL3862248W/) - [Volume 7b: XView Reference Manual](/works/OL3862247W/) **Printing History:** January 1990: Athena First Edition. September 1990: Athena Second Edition. December 1990: Motif First Edition. Customized for Motif 1.1. August 1992: Motif Second Edition. Revised for R5 and Motif 1.2. April 1993: Athena Third Edition. Revised for R5. August 1993: Motif Edition. Minor corrections. February 1995: Motif Edition. Minor corrections.