User Interface Changes

• -w command line argument to specify alternate or no workspace.
• -b command line argument for batch operation.
• -? command line argument gives usage message.
• init.lsp not loaded if workspace loaded.
• Search path can be provided for workspaces and .lsp files.
• Standard input and output can be redirected. *TERMINAL-IO* stream added which is always bound to console (stderr).
• Non-error messages are sent to *DEBUG-IO* so they don't clutter *STANDARD-OUTPUT*
• Results of evaluations are printed on a fresh line rather than at the end of the preceeding line (if any). This enhances readability.
• Display writes are buffered.
• Character literals available for all 256 values. CL
• Uninterned symbols print with leading #:. CL
• PRIN1 generates appropriate escape sequences for control and meta characters in strings. CL
• Read macro #. added. CL
• Lisp code for nested backquote macros added. CL
• Read macro #C added for complex numbers. CL
• Semantics for #S read macro changed so that it can read in structures written by PRINT. CL
• PRINT of file streams shows file name, or "closed" if a closed file stream.
• *PRINT-CASE* now applies to PRINC. CL
• Added *READTABLE-CASE* to control case conversion on input and output, allowing case sensitive code. CL-like
• Reader macros #+ and #- added, along with global variable *FEATURES*. CL
• Added optional and OS dependent checking of system stack overflow, with checks in READ, PRINT, EVAL, and in the garbage collector. Added a new function SET-STACK-MARK which performs a continuable error when the remaining stack space drops below a preset amount.
• Improved command line editing, symbol name lookup, and history (command recall) for MS-DOS.
• *PRINT-CASE* can now be :CAPITALIZE. CL
• Packages added.