aleph (א) is the first letter of the Hebrew alphabet. mem (מ) is the 13th. If you're asking what word they spell, it's אם (eem) which means "if," or אם (eim) which means "mother."
And if you're talking about an abbreviation (spelled א"ם or .א.ם ), then it could stand for any of the following:
אבידות ומציאות (modern Hebrew: lost & found)
אבטחת מידע (modern Hebrew: protection/securing of information)
אבינו מלכינו (classic Hebrew: "Avinu Malkeinu," the name of a prayer)
אגף מודיעין (modern Hebrew: Intelligence Division)
אדוני מורי (classic Hebrew: my master, my teacher)
אוניית מנוע (modern Hebrew: an engine-powered ship)
אחרי מות (Biblical/classic Hebrew: "Acharei Mot," the name of a Torah-portion)
איפכא מסתברא (Talmudic Aramaic: "the opposite makes more sense")
ארץ מצרים (Biblical and modern Hebrew: the land of Egypt)
aleph-bet-reish-hay-mem
The Aramaic word for "truth" is written as "אמת" in Hebrew characters, which can be transliterated as "emeth" or "emet." It is comprised of three consonants: Aleph, Mem, and Tav.
Aleph Zadik Aleph was created in 1924-05.
Aleph Samach was created in 1893.
An aleph number is any of a sequence of numbers used to represent the cardinality of infinite sets, denoted by the Hebrew letter aleph.
Aleph is the name of a Hebrew letter, not a person. All 150 psalms in the Bible include the letter aleph (א).
Sets are classified according to their cardinality: a measure of the number of elements that it contains. The cardinality of a set may be finite, aleph-null or aleph-one. Aleph-null is the number of integers (or rational numbers). Aleph-one
The Aleph - short story - was created in 1945-09.
Aleph at Hallucinatory Mountain was created on 2009-05-18.
Since the aleph numbers refer to cardinality of sets, aleph -1 would not make any sense. Not sure what a negative cardinality might mean?
Aleph - 1966 was released on: USA: 3 March 2009 (DVD premiere)
The Hebrew word Aleph (אלף) refers to the first letter of the Hebrew alphabet (א). Aleph is known as a silent letter, but it is also a glottal stop. The word aleph comes from the Hebrew word elef, which means thousand (or thousand-heads-of-oxen).