If you have a set of miscellaneous Bash-helpers that you frequently use, you probably want some sort of namespace for easy access. For example, prepending the name of all your helpers with "myHelper-" is a good way of getting autocomplete to show only the relevant helpers you need. "myHelper-" is too much typing, though.
Unless your distro is extremely minimal, all the letters in Bash are taken and you can't have an unambiguous single-letter "namespace". You need to look beyond letters: ',' is a ferpectly legal Bash name. You can prefix all your helpers with ',' for easy and quick autocomplete. An example from my bashrc:
function ,alogcat() {
local MAYBE_TEE
MAYBE_TEE="$1"
adb logcat -c
if [ -z "${MAYBE_TEE}" ]; then
adb logcat
else
adb logcat | tee "$MAYBE_TEE"
fi
}
function ,a-screen-off() {
adb shell input keyevent 26
}
With this, I can type ,a
to get an autocomplete of just my Android helpers.