Indian Institute of Management are a group of nineteen public autonomous institute of management education in India.
They offer Postgraduate courses, Doctoral and Executive education
programmes.
The 2 year Post Graduate Programme in Management (PGP), offering the Post Graduate Diploma in Management (PGDM), is the flagship programme across all IIMs. It is equivalent to MBA.
Some IIMs offer 1 year PG diploma Programme for graduates with more work experience
Some IIMs deliver Fellow Programme in Management (FPM), a doctoral programme. It is considered to be equal to PhD globally.
Most IIMs also offer short-term executive education/EMBA courses and part-time programmes.

As you want to know about the specializations provided by IIM’s for their PGP, I am listing some of them

Finance & Control


Marketing

Corporate Strategy and Policy

Organizational Behaviour & Human Resources Management

Production and Operations Management

Quantitative Methods and Information Systems

Economic and Social Sciences

Business Policy

Centre for Innovation Incubation and Entreprenurship

Information System

Center for Management in Agriculture

Communication

Economics

Finance and Accounting

Organizational Behavior

Personnel & Industrial Relations

Production & Quantitative Methods