Will you please suggest me some of the best short term courses after completion of Diploma in Computer Engineering???

After completion of Diploma in Computer Engineering, you can join short term computer courses like

ACCP Pro
ACWD
DCS Plus
Web Technologies - HTML5
Windows Store Apps Development
C Language
C++
Windows App Development
Programming Languages
Database Courses
DCA
Microsoft .NET
Red Hat Certification
Oracle
Java
Programming in C#
Smart Professional Java
Smart Professional .NET
Smart Professional OST
IT Booster .NET
IT Booster Java

Some good Computer Engineering Diploma Colleges in Country is as follows

A P C Roy Polytechnic, Kolkata - Diploma in Computer Engineering
A.S.M.R Institute of technology & Management (ASMR), Mathura - Diploma in Computer Science Engineering
Adhiparasakthi Polytechnic College, Kancheepuram - Diploma in Computer Engineering
AEFT's College Of Engineering and Management, Goregaon - Diploma In Computer Engineering
AEFT’s College of Engineering and Management, Thane - Diploma In Computer Engineering
Agnihotri School of Technology - Diploma in Computer Science Engineering
Amritlal Virpal Parekh Technical Institute - Diploma in Computer Engineering
B. S. Patel Polytechnic, Mehsana (BSPP) - Diploma in Computer Engineering
B.P.S. Institute of Polytechnic - Diploma in Computer Engineering
Baba Saheb Ambedkar Polytechnic - Diploma In Computer Engineering
Bhagwan Mahavir College of Engineering and Technology (BMCET) - Diploma in Computer Engineering
Bhailalbai and Bhikhabhai Institute of Technology - Diploma in Computer Engineering
BIT Institute of Technology - Diploma in Computers
Central Polytechnic College, Trivandrum - Diploma in Computer Engineering
Deshwal Institute of Information Technology and Management - Diploma in Computer Science Engineering
Directorate of Distance Education, Janardan Rai Nagar Rajasthan Vidhyapeeth University - Diploma in Computer Engineering
Dr. Babasaheb Ambedkar Technological University - Diploma course in Computer Engineering
Dr. Dhamambal Government Polytechnic College for Women - Diploma in Computer Engineering
Dr. Dharmambal Government Polytechnic College for Women - Diploma in Computer Engineering
Dr. Paul Raj Engineering College - Diploma in Computer Engineering
DR. S. & S.S. Ghandhy College of Engineering and Technology - Diploma in Computer Science Engineering
Dr.Visvesvaraya Institute of Engineering & Technology - Diploma in Computer Engineering
E-max Polytechnic College - Diploma in Computer Science Engineering
Farooqia Womens Polytechnic - Diploma in Computer Enggineering
Ghousia Polytechnic for Women - Diploma in Computer Science & Engineering
Goverment Polytechnic College, Kunnamkulam - Diploma in Computer Engineering
Government Polytechnic - Diploma in Computer Technology
Government Polytechnic - Diploma in Computer Engineering
Government Polytechnic for Girls - Diploma in Computer Engineering
Government Polytechnic for Women, Jammu - Diploma in Computer Engineering
Government Polytechnic Kanpur - Diploma in Computer Science Engineering
Government Polytechnic, Panaji - Diploma in Computer Engineering
Government Polytechnic-Ratanagiri - Diploma in Computer Enginering
Government Residential Polytechnic for Women - Diploma in Computer Enggineering
Government Women's Polytechnic College - Diploma in Computer Science Engineering
Government Women's Polytechnic College, Gwalior - Diploma in Computer Technology
Govt. Polytechnic for Women, Srinagar - Diploma in Computer Science Engineering
Govt. Polytechnic Hisar - Diploma in Computer Engineering
Hindustan Institute of Engineering Technology - Diploma in Computer Engineering
HKES Polytechnic - Diploma in Computer Science Engineering
Ideaon Think - ideaon-DSE
Imayam Polytechnic College - Diploma in Computer Engineering
Indira Gandhi National Open University - Diploma in Computer Integrated Manufacturing
Institute of Foreign Trade and Management University - Diploma in Computer Engineering
Institute of Shipbuilding Technology,Goa - Diploma in Computer Engineering
Jamia Milia Islamia University, Delhi - Diploma in Computer Engineering
Jamia Milia Islamia University, Delhi - Diploma in Computer Engineering
Jamia Milia Islamia University, Delhi - Diploma in Computer Engineering
Jamwal Group of Educational Institutions, North Polytechnic - Diploma in Computer Engineering
Jaya Prakash Narayan College of Engineering (JPNCE), Mahabubnagar - Diploma in Computer Engineering
Jyothishmathi Institute of Technology and Sciences, Karimnagar - Diploma in Computer Engineering
K.S.R Polytechnic College - Diploma in Computer Science Engineering
Karnataka State Open University, Bangalore - Diploma in Computer Engineering
Karpagam Polytechnic College - Diploma in Computer Science Engineering
Kiran Institute of IT & Management - Diploma In Computer Engineering
Kongu Polytechnic College - Diploma in Computer Engineering
Latha Mathavan Polytechnic College - Diploma in Computer Science Engineering
LN Group of Institutes - Diploma in Computer Engineering
Mahathma Gandhi Education Foundation, Alappuzha - Diploma In Computer Engineering
Mahaveer Institute of Science Technology - Diploma in Computer Science & Engineering
Mod-Tech College of Engineering - Diploma in Computer Science & Engineering
Nachimuthu Polytechnic College - Diploma in Computer Engineering
Nandha Polytechnic College - Diploma in Computer Science & Engineering
Naval Institute Of Technology - Diploma In Computer Engineering
Nilachal Polytechnic - Diploma in Computer Science Engineering
NIMS University, Jaipur - Diploma in Computer Engineering
Nirma University - Diploma in Computer Engineering
Padmabhooshan Vasantraodada Patil Institute of Technology - Diploma In Computer Engineering
Patiala Polytechnic College - Diploma in Computer Engineering
PN Data System - Vadodara - Diploma in Computer Engineering
Polytechnic Institute, Maharaja Sayajirao University - Diploma in Computer Engineering
Ponnaiyah Ramajayam Polytechnic College - Diploma in Computer Engineering
PSG College of Technology - Diploma in Computer Engineering
Rajaji Institute of Technology - Diploma in Computer Technology
RRS College of Engineering & Technology (RRSCET) - Diploma in Computer Engineering
Rudhraveni Muthuswamy Polytechnic College,Udumalpet - Diploma in Computer Engineering
S.B. Patil Polytechnic - Diploma in Computer Engineering
S.R.S Govt. Polytechnic College For Girls, Ludhiana - Diploma in Computer Engineering
Samskruti College of Engineering And Technology - Diploma in Computer Engineering
Satara Education Society's Satara Polytechnic - Diploma in Computer Engineering
SBCM Institute of Technology - Diploma in Computer Engineering
SD Shanti Niketan Institute of Engineering & Technology - Diploma in Computer Engineering
Seethi Sahib Memorial Polytechnic College - Diploma in Computer Engineering
Shree Balaji Institute of Engineering & Technology, Hisar (SBIET) - Diploma in Computer Engineering
Shri Krishan Institute of Engineering and Technology, Kurukshetra (SKIET) - Diploma in Computer Engineering
SLN Correspondence College - Diploma in Computer Engineering
SoftBrain Informatic Technology Pvt. Ltd - Diploma in Computers
Sri Chundi Ranganayakulu Engineering College, Guntur - Diploma in Computer Engineering
Sri Sai Ram Polytechnic College - Diploma in Computer Technology
Sri Vidyanikethan Engineering College, Chittoor - Diploma in Computer Engineering
Subramanian Polytechnic College - Diploma in Computer Science Engineering
Times College of Engineering and Technology - Diploma in Computer Science Engineering
Tolani Foundation Gandhidham Polytechnic, Abhipur (TFGP) - Diploma in Computer Engineering
University Polytechnic College - Diploma in Computer Engineering
Vallabh Budhi Polytechnic - Diploma in Computer Engineering
Vivekanand Institute of Technology & Management College, Varanasi - Diploma in Computer Science Engineering