ACH may refer to:
The Achaemenid Empire (/əˈkiːmənɪd/, from Old Persian Haxāmanišiya, c. 550–330 BC), also called the (First) Persian Empire, was an empire based in Western Asia, founded by Cyrus the Great.
In Greek mythology, Achilles (/əˈkɪliz/, uh-KILL-eez; Greek: Ἀχιλλεύς) was a Greek hero of the Trojan War and the central character and greatest warrior of Homer's Iliad.
Achillea millefolium, commonly known as yarrow /ˈjæroʊ/ or common yarrow, is a flowering plant in the family Asteraceae.
Achtung Baby (pronunciation: /ˈɑːktuːŋ ˈbeɪbiː/) is the seventh studio album by Irish rock band U2. It was produced by Daniel Lanois and Brian Eno, and was released on 18 November 1991 on Island Records.
The term achievement gap is used to refer to the observed, persistent disparity of educational measures between the performance of groups of students, especially groups defined by socioeconomic status (SES), race/ethnicity and gender.
"Nice Pete" redirects here. For "Nice Peter", the co-creator of Epic Rap Battles of History, see here
Acharya Institute of Technology, or AIT, is a private co-educational engineering and management college in Bengaluru, India, affiliated with the Visvesvaraya Technological University (VTU) and accredited by the National Board of Accreditation (NBA).
Acharei Mot, Aharei Mos, or Ahare Moth or Acharei (אַחֲרֵי מוֹת or אַחֲרֵי — Hebrew for "after the death" or "after," the fifth and sixth words or the fifth word, and the first distinctive word or words, in the parashah) is the 29th weekly Torah portion (פָּרָשָׁה, parashah) in the annual Jewish cycle of Torah reading and the sixth in the Book of Leviticus.
Achalasia (/eɪkəˈleɪʒə/; a- + -chalasia "no relaxation") is a failure of smooth muscle fibers to relax, which can cause a sphincter to remain closed and fail to open when needed.