Here's what happens running the '-h' option:
BusyBox v1.18.3 (2011-02-11 12:08:19 PST) multi-call binary.
Usage: tar -[cxtzjZmvO] [-X FILE] [-f TARFILE] [-C DIR] [FILE]...
Create, extract, or list files from a tar file
Operation:
c Create
x Extract
t List
Options:
f Name of TARFILE ('-' for stdin/out)
C Change to DIR before operation
v Verbose
z (De)compress using gzip
j (De)compress using bzip2
Z (De)compress using compress
O Extract to stdout
h Follow symlinks
m Don't restore mtime
exclude File to exclude
X File with names to exclude
T File with names to include
tc@box:~$