SCM
Chapter 4: The Language
Standards Compliance
Links to sections in [R4RS] and [SLIB]
Miscellaneous Procedures
Time
Both real time and processor time
Interrupts
and exceptions
Process Synchronization
Because interrupts are preemptive
Files and Ports
Soft Ports
Emulate I/O devices
Syntax Extensions
Low Level Syntactic Hooks
Syntactic Hooks for Hygienic Macros