Noise-cancelling headphones. Noise-cancelling headphones are headphones that reduce unwanted ambient sounds using active noise control. This is distinct from passive headphones which, if they reduce ambient sounds at all, use techniques such as soundproofing.
English to Speakers of Other Languages (ESOL): The term ESOL is generally used when describing programs outside of a PK-12 setting that are designed for ELLs who seek proficiency in social and academic language; ESOL programs, which may also be referred to as English as a Second Language programs, generally teach basic grammar, vocabulary and ...
1 Fayol presented work specialization as the best way to use the human resources of the organization.  AUTHORITY: The concepts of Authority and responsibility are closely related. Authority was defined by Fayol as the right to give orders and the power to exact obedience.