Various versions of Square technology
Square technology was invented by entrepreneur Jack Dorsey and computer science engineer and economist, Jim McKelvey. The idea emerged because McKelvey, who is also a glass artist, was having difficulty accepting large payments for the sale of his artwork. When unable to process credit card payments from his clients, he and Dorsey began working on a portable and inexpensive method of processing debit and credit card sales. They founded Square in 2009 in the United States and its point of sale software is now available worldwide.