+
+Supported architectures:
+
+ Busybox in general will build on any architecture supported by gcc. It has
+ a few specialized features added for __sparc__ and __alpha__. insmod
+ functionality is currently limited to x86, ARM, SH3/4, powerpc, m68k,
+ MIPS, and v850e.
+
+Supported libcs:
+
+ glibc-2.0.x, glibc-2.1.x, glibc-2.2.x, Linux-libc5, uClibc. People
+ are looking at newlib and diet-libc, but consider them unsupported,
+ untested, or worse.
+
+Supported kernels:
+
+ Full functionality requires Linux 2.0.x, 2.2.x, or 2.4.x. A large fraction
+ of the code should run on just about anything.
+
+----------------
+
+Shells:
+
+lash is the very smallest shell (adds just 10k) and it is quite usable as
+a command prompt, but it is not suitable for any but the most trivial
+scripting (such as an initrd that calls insmod a few times) since it does
+not understand Bourne shell grammer. It does handle pipes, redirects, and
+job control though. Adding in command editing makes it a very nice
+lightweight command prompt.
+
+hush is also quite small (just 18k) and it has very complete Bourne shell
+grammer. It handles if/then/else/fi just fine, but doesn't handle loops
+like for/do/done or case/esac and such. It also currently has a problem
+with job control. Using hush is not yet recommended.
+
+msh: The minix shell (adds just 30k) is quite complete and handles things
+like for/do/done, case/esac and all the things you expect a Bourne shell to
+do. It is not always pedantically correct about Bourne shell grammer (try
+running the shell testscript "tests/sh.testcases" on it and compare vs bash)
+but for most things it works quite well. It also uses only vfork, so it can
+be used on uClinux systems. This was only recently added, so there is still
+room to shrink it further...
+
+ash: This adds about 60k in the default configuration and is the most
+complete and most pedantically correct shell included with busybox. This
+shell was also recently added, and several people (mainly Vladimir and Erik)
+have been working on it. There are a number of configurable things at the
+top of ash.c as well, so check those out if you want to tweak things.
+
+----------------
+