Both these effects reduce the workload of the heart, so beta blockers are of value in treating the symptoms of angina pectoris, the chest pain brought on by narrowing of the coronary arteries that causes inadequate delivery of oxygen-rich blood to the heart muscle.
3 1. The invention and the history of the Dell computer is quite interesting. First of all, it was in 1984 when Michael Dell, a student at the University of Texas at Austin, created the company PC's Limited. He only had a starting capital of $1,000.
1 The first electronic computer was invented by John Vincent Ansoff. 2  He named it the Anatasoff Berry Computer, or the ABC. 3  Now, if we're talking technical knowledge and actual precursors to the PC-IBM may have accidentally spread it around when they allowed cloning of the PC architecture. 4  But they were not the first. The first computer was invented by a British scientist Charles P.Babbage in 1822 but completed in 1871 by Helmet P.Babbage (the son of Charles P.Babbage). The Difference Engine: The first of these devices was conceived in 1786 by J. H. Mueller. It was never built.