Starting in 1979 and working forward in history until now:
11B Infantry 5 years
Normal Infantry tasks, including radio operator, machine gunner, scout, jeep driver, squad member, armored personnel carrier driver, TOW missile crewman. In both Light and Mechanized Infantry Divisions.
From The Army about 11B 11B Overview
Or 11B more details but "same" basic info (non-Army site)
(Sorry, they as of now (2001) won't let females go out and run around attacking things. Write your political leaders (?). I say? Let them in! As long as a female can meet the physical requirements, why not? No reason. No non-opinion reasons, at least............)
24L/27H IH Launcher/Loader DS&GS Maintenance 3 Years
HAWK radar guided rocket launcher, loader, and control equipment Direct and General Support Maintenance (upper level) repair.
This MOS was 24L, then eventually changed to 27H; same job. It is not a current Army MOS as the HAWK has been sold and been replaced in the U.S. by Patriot. The Marines MAY still have it, though, as they kept it longer than the Army did. But probably not. 24L/27H
39B ATE Operator/Maintainer 9 Years
Automatic (computerized) Test Equipment and circuit board/assembly troubleshooting and repair at the DS/GS level. Test/repair of TACFIRE artillery equipment, radios, MLRS rocket equipment, and Apache helicopter systems. Also calibration and repair of ATE systems. That 9 years includes 4 years as an instructor of ATE systems and digital logic/computer theory.
See here for tasks involved in 39B (X1 ASI, Apache related) 39BX1 Apache repair tasks
More info about basic MOS: Basic 39B MOS stuff.
74B Information Systems Programmer/Analyst 3 Years
Operate, install, maintain and repair computers, software, routers, hubs, transmission integration equipment, cables; network administration, help desk operation, etc.
Here for Army plug that explains this MOS pretty well, almost kinda like: 74B Overview More: Other Site