If you frequent a site enough time, your browser will start to auto-complete that site’s URL when you begin typing its domain. Here is a list of what a single letter entered into the address bar of my browser produces.
A - amazon.com
B - boards.greenhouse.com
C - chatgp.com
D - daringfireball.net
E - en.wikipedia.org
F - fasterthenl.me
G - github.com
H - hackmd.gfuzz.de
I - imore.com
J - jimmymiller.github.i
K - kottke.org
L - lobste.rs
M - mail.google.com
N - news.ycombinator.com
O - os.phil-opp.com
P - polymonster.co.uk
Q - quillbot.com
R - rsdlt.github.io
S - sourcegraph.com
T - textualize.io
U - usgs.gov
V - veykril.github.i
W - www.youtube.com
X - xeiaso.net
Y - youtube.com
Z - zed.dev