4 Program Behavior for All Programs

• Semantics: Writing robust programs
• Libraries: Library behavior
• Errors: Formatting error messages
• User Interfaces: Standards about interfaces generally
• Graphical Interfaces: Standards for graphical interfaces
• Command-Line Interfaces: Standards for command line interfaces
• Option Table: Table of long options
• Memory Usage: When and how to care about memory needs
• File Usage: Which files to use, and where