51.   Microsoft specializes in writing operating systems, a class of software that controls the basic functions of a computer or controls the flow of information through computer networks.

52.   Most automobiles use a single flat plate over an opening to control air flow headed to the combustion chamber.

53.   New mathematical rules or processes, called algorithms, used in the computer programs to control the flow of electricity into batteries can help reduce recharging times.

54.   Now it is the dealers who accuse him of controlling the flow of drugs in South Boston.

55.   Now, utilities control the flow of electrons from start to finish, building the generating plants, operating the transmission lines and servicing the meters in every home.

56.   Police are calling in extra officers and planning to block off residential streets, if necessary, to control the flow of cars.

57.   Right now, the two sides are smashing heads in deciding who is going to control the flow of the game.

58.   Sales of Windows NT, a program to control the flow of information through corporate computer networks, more than tripled, Microsoft executives said.

59.   So far it has insisted on dictating the terms of detente so that it can control the flow of information into its country.

60.   Software controls the flow of calls, making sure they get to the right receiver.