Refers to any shortened form of a word or phrase, including initialisms and acronyms. Common in both everyday and technical contexts.
"Sumaho" is an abbreviation of "sumātofon" (smartphone).
この略語の正式名称を知っていますか。
Do you know the full name of this abbreviation?
IT is an abbreviation for Information Technology.
People often use abbreviations in conversation.
Long names are often expressed in abbreviated form.