Scheme 48 Manual -- Command processor

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# Command processor

This chapter details Scheme 48's command processor, which incorporates both a read-eval-print loop and an interactive debugger. At the `>` prompt, you can type either a Scheme form (expression or definition) or a command beginning with a comma. In inspection mode the prompt changes to `:` and commands no longer need to be preceded by a comma; input beginning with a letter or digit is assumed to be a command, not an expression. In inspection mode the command processor prints out a menu of selectable components for the current object of interest.

- Current focus value and `##`
- Command levels
- Logistical commands
- Module commands
- Debugging commands
- Switches
- Inspection mode
- Command programs
- Building images
- Resource query and control
- Threads
- Quite obscure

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