Hmm. From Minix 1.7: $ du -sh * 144K bin 64K etc 0 fd0 0 fd1 108K minix 0 mnt 0 root 0 tmp 22M usr $ du -sh usr/*

Hmm. From Minix 1.7: $ du -sh * 144K bin 64K etc 0 fd0 0 fd1 108K minix 0 mnt 0 root 0 tmp 22M usr $ du -sh usr/* 24K usr/ast 3.9M usr/bin 124K usr/doc 0 usr/etc 436K usr/include 1.4M usr/lib 0 usr/local 2.0M usr/man 36K usr/mdec 0 usr/preserve 0 usr/run 0 usr/spool 14M usr/src 0 usr/tmp So if you're willing to lose the source code, you could fit the entire system into about 8MB. Of course, you don't get Perl. Or, uh, TCP/IP networking. You need Minix 2.0 for that, which is much bigger; 26MB with source, or 10MB without.