A heat lamp is an essential for any office that treats patients with musculoskeletal pain. While cold therapy is ideal for acute injuries, heat is applied to help with long-term pain and stiffness. Most chiropractors use infrared heat lamps, which give off no visible light but create a soothing sensation of warmth that relaxes the tissues beneath it. Heat may be applied as a therapy of its own or to loosen up muscles prior to massage therapy, traction, and manipulation.
We could argue that the first computer was the abacus or its descendant, the slide rule, invented by William Oughtred in 1622. But the first computer resembling today's modern machines was the Analytical Engine, a device conceived and designed by British mathematician Charles Babbage between 1833 and 1871.e could argue that the first computer was the abacus or its descendant, the slide rule, invented by William Oughtred in 1622. But the first computer resembling today's modern machines was the Analytical Engine, a device conceived and designed by British mathematician Charles Babbage between 1833 and 1871.
At first, these were purely mechanical, but by the start of the twentieth century, they were run by steam.     The first of the modern computers was invented during World War II, in 1941 by a German engineer named Konrad Zuse.The computer was called the Z3 and was used to help design German airplanes and missles. Still others will say the abacus is the first computer. They were  invented by the Chinese between 2600 BC and 300 BC is considered as  the first computer ever. Abacus was used by the merchants and  Clerks in China.