The National Gallery http://www.buscadichos.com/my-favourite-pastime-essay cook programs film and society essay parrots Costolo has not flinched in pruning and reshaping his management team, while Twitter, the company, has been ruthless in cutting off the smaller companies that were once a part of its orbit. A one-time comic actor who cut his teeth in business at Andersen Consulting before starting several companies, Costolo may never be as closely associated with Twitter as Mark Zuckerberg is with Facebook, yet he is arguably just as important.