This insertion is to give a bit of clarity to the people who are interested to know about the modules in SAP. Lot of aspiring people who want to learn SAP, ask which module is better for me, which is more lucrative in the terms of getting in to a job and more payment.
The Answer is simple. The best suited module for you is the experience in which domain you have and where you want to nurture your career.
Each and every module is important in relation to any Enterprise. No one can say that for me only my production, sales and distribution are important and we do not care about plant maintenance or warehouse management.
More fetching may be plant and maintenance as only few people will take up this module at present, availability of trained people in this module are scares at present time. But by the time you come out of the institute trained what is the guarantee that same amount of scarcity prevails. So you can not foresee the demand today. For any bright candidate with proper experience, good understanding on the business process of the enterprise and willing to take that extra mile - employment and earning should not be a problem at all.
So have some at least two to three years of experience, select the module which complement your domain experience and get the skill.
Following are few modules in SAP for your ready reference.
APO Advanced Planning Optimization
BW Business Information Warehousing
CRM Customer relationship Management (Mobile sales, Internet sales and interactions)
DW Data Warehousing
EHS Environment, Health and Safety
EP SAP Enterprise Portal
FI CO Finance and Control
HCM Human Capital Management
HR Human Resource Management
MM Material Management
PLM Product Life cycle Management
PM Plant Maintenance
PP Production Planning
PS Project System
SCM Supply Chain Management
SD Sales and Distribution
SEM Strategic Enterprise Management
SRM Supplier Relationship Management
WM Warehouse Management
XI Exchange Infrastructure
Have a nice day.