There are over 190 Army MOS Codes for the enlisted here we list the main ones.
The United States Army uses various personnel management systems to classify soldiers in different specialties with army mos codes. Enlisted soldiers are categorized by their assigned job called a military occupational specialty, or MOS. Each MOS are labeled with a short alphanumerical code called a military occupational specialty code (MOSC), which consists of a two-digit number appended by a Latin letter. Related MOSs are grouped together by Career Management Fields (CMF). For example, an enlisted soldier with MOSC 11B works as an infantryman (his Army MOS Codes), and is part of CMF 11 (the CMF for infantry).

Army MOS Codes
Field 09 — Native LanguageSpeaker
Field 11 — Infantry
Field 13 — Artillery
Field 14 — Air Defense
Field 15 — Aviation
Field 18 — Special Forces
Field 19 — Armor
Field 21 — Engineering (Construction)
Field 25 — Signals (Communications)
Field 27 — Legal Services
Field 29 — Electronic Warfare
Field 31 — Law Enforcement
Field 35 — Intelligence
Field 36 — Finance
Field 37 — Psychological Operations
Field 38 — Civil Affairs
Field 42 — Administrative
Field 46 — Public Affairs
Field 56 — Religious Services
Field 68 — Medical
Field 74 — Chemical Warfare
Field 79 — Recruiting and Retention
Field 88 — Transportation
Field 89 — Explosives and Ammunition
Field 91 — Maintenance
Field 92 — Supply and Logistics
Field 94 — Electronic/Missile Maintenance
Army Mos Codes Conclusion
There is a lot more info to be had on Army MOS. Keep checking this category for further updates on Army MOS Codes.