This is GNU tar, the tape archiving program.
-A, +catenate,
    +concatenate	append tar files to an archive
-c, +create		create a new archive
-d, +diff,
    +compare		find differences between archive and file system
+delete			delete from the archive (not for use on mag tapes!)
-r, +append		append files to the end of an archive
-t, +list		list the contents of an archive
-u, +update		only append files that are newer than copy in archive
-x, +extract,
    +get		extract files from an archive
Other options:
-b, +block-size N	block size of Nx512 bytes (default N=20)
-B, +read-full-blocks	reblock as we read (for reading 4.2BSD pipes)
-C, +directory DIR	change to directory DIR
-f, +file [HOSTNAME:]F	use archive file or device F (default /dev/tape)
-F, +info-script F	run script at end of each tape (implies -M)
-G, +incremental	create/list/extract old GNU-format incremental backup
-g, +listed-incremental F create/list/extract new GNU-format incremental backup
-h, +dereference	don't dump symlinks; dump the files they point to
-i, +ignore-zeros	ignore blocks of zeros in archive (normally mean EOF)
-k, +keep-old-files     keep existing files; don't overwrite them from archive
-K, +starting-file FILE	begin at FILE in the archive
-l, +one-file-system	stay in local file system when creating an archive
-L, +tape-length LENGTH change tapes after writing LENGTH
-m, +modification-time	don't extract file modified time
-M, +multi-volume	create/list/extract multi-volume archive
-N, +after-date DATE,
    +newer DATE		only store files newer than DATE
-o, +old-archive,
    +portability	write a V7 format archive, rather than ANSI format
-O, +to-stdout		extract files to standard output
-p, +same-permissions,
    +preserve-permissions extract all protection information
-P, +absolute-paths	don't strip leading `/'s from file names
+preserve		like -p -s
-R, +record-number	show record number within archive with each message
-s, +same-order,
    +preserve-order	list of names to extract is sorted to match archive
+same-order		create extracted files with the same ownership 
-S, +sparse		handle sparse files efficiently
-T, +files-from F	get names to extract or create from file F
+totals			print total bytes written with +create
-v, +verbose		verbosely list files processed
-V, +label NAME		create archive with volume name NAME
+version		print tar program version number
-w, +interactive,
    +confirmation	ask for confirmation for every action
-W, +verify		attempt to verify the archive after writing it
-X, +exclude FILE	exclude file FILE
+exclude-from FILE	exclude files listed in FILE
-z, -Z, +compress,
    +uncompress      	filter the archive through compress
-[0-7][lmh]		specify drive and density