The Directory Stack (Bash Reference Manual)| www.gnu.org
Shell Parameters (Bash Reference Manual)| www.gnu.org
Shell Expansions (Bash Reference Manual)| www.gnu.org
Top (Bash Reference Manual)| www.gnu.org
Indexes (Bash Reference Manual)| www.gnu.org
Shell Parameter Expansion (Bash Reference Manual)| www.gnu.org
Brace Expansion (Bash Reference Manual)| www.gnu.org