School,College N Company

School: Two books for one subject.
College: One book for all subjects.
Company: Books? Ye kya hota hai. Only follow standards.

School: A White pipe in teacher's hand - CHALK
College: A White pipe in student's hand  CIGARETTE
Company: A White pipe in employee's hand  100% CIGARETTE

School: Most Frequent letter- LEAVE LETTER
College: Most Frequent letter- LOVE LETTER
Company: Most Frequent letter- RESIGNATION LETTER

School: If we go it's boring.
College: If we don't go it's boring.
Company: Go/don't go, it's boring