Optional Practical Training (OPT) is defined as "temporary employment for practical training directly related to the student's major area of study."
As a benefit of F-1 visa status, you are permitted, when eligible, to apply for a total of one year or 365 days
of employment authorization to gain practical training in your field of study (i.e. the major listed on your I-20). OPT Reporting Form OPT Application Step-by-Step Guide
Curricular Practical Training
Curricular Practical Training (CPT) is an employment authorization for students in F-1 visa status for employment that is an "integral part of an established curriculum." DOWNLOAD CPT APPLICATION