I called Tennis Warehouse a few weeks ago and inquired about how they measure racquet flexibility/stiffness and assign ratings (RA) given that most of the ratings they assign seem to differ from those listed by the actual racquet manufacturers.
What is Optional Practical Training (OPT)? Optional Practical Training (OPT) is the opportunity for an F-1 student to apply knowledge gained in the classroom to a practical work experience. OPT is a work permit allowing F-1 students to work in the U.S. for up to 12 months following graduation in a job related to their major.
Here are the differences: An OPT is available to eligible F1 visa students who are allowed - if they meet the qualifications - to apply their specialized knowledge to a directly related job. After completing the first academic year, F-1 students are eligible to work in three different types of off-campus employment: