SCM

1.2: Features

• Conforms to Revised^4 Report on the Algorithmic Language Scheme [R4RS] and the [IEEE] P1178 specification.
• Support for [SICP], [R2RS], [R3RS], and (proposed) [R5RS] scheme code.
• Runs under Amiga, Atari-ST, MacOS, MS-DOS, OS/2, NOS/VE, Unicos, VMS, Unix and similar systems. Supports ASCII and EBCDIC character sets.
• Is fully documented in TeXinfo form, allowing documentation to be generated in info, TeX, html, nroff, and troff formats.
• Supports inexact real and complex numbers, 30 bit immediate integers and large precision integers.
• Many Common Lisp functions: logand, logor, logxor, lognot, ash, logcount, integer-length, bit-extract, defmacro, macroexpand, macroexpand1, gentemp, defvar, force-output, software-type, get-decoded-time, get-internal-run-time, get-internal-real-time, delete-file, rename-file, copy-tree, acons, and eval.
• Char-code-limit, most-positive-fixnum, most-negative-fixnum, and internal-time-units-per-second constants. *Features* and *load-pathname* variables.
• Arrays and bit-vectors. String ports and software emulation ports. I/O extensions providing ANSI C and POSIX.1 facilities.
• Interfaces to standard libraries including REGEX string regular expression matching and the CURSES screen management package.
• Available add-on packages including an interactive debugger, database, X-window graphics, BGI graphics, Motif, and Open-Windows packages.
• A compiler (HOBBIT, available separately) and dynamic linking of compiled modules.
• User definable responses to interrupts and errors, Process-syncronization primitives. Setable levels of monitoring and timing information printed interactively (the verbose function). Restart, quit, and exec.