What is Tandy radio shack and CP/M if you wan to know about these computer things than read informatin below

Design camp number two rallied under the radio shack flag.The familiar corner store vendor of everything from batteries  and toys to watches and telephones added small computers to its wide range of offerings by producing a number of machines  based on different technologies microprocessors and operating systems. The wide variety of the Radio shack products was intended to appeal to the widest market The leader all the time of the introduction of IBM's First machine was the TRS 80,A desktop computer combining monitor,keyboard and electronics into a  single box ,all built around a z 80 microprocessor both cassette and floppy disk storage was available the later using the TRS DOS (widely known as trash DOS to both its friend and detractors). The nickname applied to the model designation is one of the reasons this computer brand has officially disappeared from the market after years of trashy jokes.Radio shack's corporate parent tandy corporation elected to pull not only the TRS designation but also the radio shack label from its computer products,and instead substituted its own name and less allusive model numbers.
Among the virtues of the TRS 80 Were it ability to show 80 coloumn text in upper and lower case characters.among its  biggest drawbacks were its styling,which was of the sort that appealed to those who found aesthetic ecstasy in the  cadillac tail fins of a generation earlier.it was all rounded curves and metalized plastic,styling that might appeal more to buck rogers than to a businessman.

CP/M : The third group of small computers huddled around the CP/M operating system and acronym for controm program for Micro computers.CP/M linked the popluar and powerful 8080 and z80 microproccessors with flexible dsik drives.its low cost and usefulness led to its wide use and its emergence as a standard. CP/M baed computers typically allowed the use of 80 coloumn text with lowercase characters in a text oriented display that usually ran through a teletype interface.The teletype interface was designed for computers constructed from separate  terminals and central processing units which communicated through thin wires one bit at a time (serially).. The combination of microprocessor and operating system yielded enough power to handle many business chores,from word processing to book keeping,it was exactly what was needed in business and consequently CP/M computers emerged as the  business standard among desktop machines.in the early 80's more business oriented software (which often consisted of little more than a few dozen lines of basic code)was available for CP/M than that of any other computer operating environment.