Dan Borislow, American businessman, invented the magicJack (born 1961)

Daniel Marc Borislow was an American entrepreneur, sports team owner, inventor, and thoroughbred horse breeder. Borislow was born and grew up in Philadelphia, Pennsylvania, and attended Widener University. In 1989, he founded Tel-Save, Inc. to resell access to AT&T long distance lines. Borislow took the company public in 1995, and two years later brokered a $100 million deal with AOL at the "Cafe L’Europe," Palm Beach. In early 1998, Tel-Save had sales of $300 million and was valued by Wall Street investors at $2 billion. However, due to the financial strain of paying off the AOL deal, Tel-Save lost $221 million in 1999, and Borislow sold his stock for approximately $300 million and retired.

MagicJack, stylized as magicJack, is a service that allows people in the United States and Canada to make phone calls over the Internet. This type of phone service is called Internet-based telephone service (VoIP).