A
add/create—Use add for existing items; use create for new items. (Add a new person / Create a new account).
AM—Uppercase without periods. Add space between the number (10 AM).
B
beta—Lowercase.
browser—Lowercase.
C
canceled, canceling, but cancellation
choose/select—Use choose in most cases, like in a drop-down menu. With checkboxes or a similar element requires users to click something, select is better.
D
delete/remove—Use delete for items that are permanently gone; use remove for things that will still exist but are moved. (Delete a person / Remove an account).
double-click—One word, hyphenated.
E
e.g.,—Avoid. Means “for example” and is always followed by a comma.
email—Noun or verb one word, no hyphen.
H
homepage—One word.
hyperlink—Don’t use. Use link.
I
i.e.,—Avoid. Means “that is” and is always followed by a comma.
ID—Uppercase, no punctuation.
inbox—Lowercase, one word.
internet—Lowercase.
K
keyword—One word.
L
log in and login—Log in (verb); login (noun). We use sign in / sign out. Only use when giving directions for products like Facebook that use log in.
M
me/my—Don’t use. Use second person, you/your. Your Account not My Account.
megabyte—Use the abbreviations MB, capitalized with a space between it and the number: 34 MB.
mobile number—Used to distinguish between phone number; don’t use the word number by itself.
N
Net Promoter Score® or NPS®—Both variations are acceptable.
O
online—One word, no hyphen.
OK—Not okay when used in UI.
P
phone number—Used to distinguish from mobile number; don’t use the word number by itself.
PM—Uppercase without periods. Add space between the number (10 PM).
R
right-click—One word, hyphenated.
S
set up /setup—Set up is two words when it’s a verb. (You need to set up Webchat.) Setup is one word when it’s a noun or adjective. (You’ve finished the setup for Webchat.)
sidebar—One word, use instead of side navigation.
sign in and sign out—Two words no hyphens.
SMS—Don’t use this abbreviation instead say text or text messaging. (Unless needed to distinguish between SMS and MMS in a technical sense.)
T
third-party—One word, hyphenated.
U
UK / United Kingdom—Use UK as an adjective, capitalize, no periods; use United Kingdom as a noun.
username—One word.
U.S. / United States—Use U.S. as an adjective, capitalize, with periods; use United States as a noun.
W
website—Lowercase. Use internet in most cases.