Use hacker to refer to a user who intentionally accesses a system with the intent to cause harm to the system or to use it in an unauthorized manner. Do not use hack to refer to improvising a solution to a programming problem. Do not use hacker to refer to an amateur programmer. If the intent of unauthorized access is unknown or is not malicious, use unauthorized user. See also security.
Hyphenate as an adjective. Use instead of half an inch or one-half inch. When space is limited or the measurement needs to be specific, use 0.5 in.
Do not use abbreviations or acronyms that form English words unless you have no other choice. Doing so may lead to mistranslation in machine-translated content. For ...