Tower Floor -- X Window System

Behind you a spiral stone staircase leads up to (signed) C Programming and down Encryption.

Just to the left of the staircase, the ever present white marble circle can be seen.

Particular Important titles include...

How to run a remote X window Client

X Event Binding and Using

Authorizations and Security
It is old, but every bit as relevent today as it was when written

History of X windows (short)

 Name                     Description
 Applications.hints       Specific Application Hints and Tips
 Bitmap_Drawing           Problems with Drawing Bitmaps under X
 CDE.hints                CDE & DtLogin Info (User Orientated)
 CDE_Solaris_notes.txt    CDE Under Solaris (System Orientated)
 CTwm.colors.hints        CTwm color suggestions
 CTwm.hints               CTwm Hints and Tips
 Colors.hints             X Colors/Colormap Programming
 DECwindow.hints          DEC Windows Problems
 Environment.hints        X Window Environment variables
 FontServers.hints        X Font Server Notes
 Fonts.XF86v4_problem     X Font Problem under XF86 version 4
 Fonts.hints              X Fonts Information
 Gnome.hints              Gnome Hints and Tips
 Icon_Recolor             Reducing Icon Colors
 Image_Remote_Control.txt 
 Imakefile.hints          Imakefile Hints
 KDM.hints                KDM Infomation and Modifications
 Keysyms.hints            XKeysyms, Information
 MacX.hints               Macintosh X setup (MacX very old)
 Motif.hints              Motif Window Manager Hints
 NCD.hints                NCD XTerminal Hints and Tips
 OpenBox.hints            OpenBox Window Manager
 Pixmap_Editors           A study of the numerious Pixmap Editors
 Programing.hints         General X Programming
 Properity.hints          Properity Settings
 Resources.hints          X Resources Hints and Tips
 Thumbnailing.txt         
 Tk.hints                 Tcl/Tk X Toolket Programming
 Twm.colors.hints         Twm color suggestions
 Twm.hints                Twm Hints and Tips
 User.hints               General User Hints
 VNC_RFB.hints            
 Widget.hints             Xt Widget Programming
 WindowID.hints           Using X Window ID in shell scripts
 X.gif                    
 XDM.hints                XDM Infomation and Modifications
 XSun.hints               MIT XSun server Modifications and Bugs
 XView.hints              Sun Openlook and XView Problems
 Xterm.hints              Xterm General Hints and Tips
 Xterm_ctlseqs.txt        Xterm Control Sequences  (XF86)
 Xterm_paste_problem.txt  Xterm Paste Text Problem
 Xterm_slave.hints        Opening a Xterm as an appl sub-window
 Xterm_xf86.terminfo      Xterm terminfo source file  (XF86)
 XtextKeys                Athena Text Widget Keys Summary
 display_needs.txt        How to run a remote X window Client
 event_handling.txt       X Event Handling (hotkeys and macros)
 history.txt              A short history of X windows
 lxpanel.hints            
 progs.summary            Local X Client Summary
 script.hints             X Scripts - ideas and kludges
 security.txt             Authorizations and Security
 xdmR4.README             
 xdmR4.patch01            
 xdmR4.patch02            
 xplaces.help             Xplaces to Setup Display  (Yuck!)

You can go..