Shell Functions (Bash Reference Manual)| www.gnu.org
Arrays (Bash Reference Manual)| www.gnu.org
Bash Builtins (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
Bash POSIX Mode (Bash Reference Manual)| www.gnu.org
Shell Parameter Expansion (Bash Reference Manual)| www.gnu.org