They had been used before that. they were simply intergrated to the computer programming system after along period. the power symbol was developed in ww2.
The answer to the question: A simple symbolic interface was developed to operate computers, would be: True.
Explanation:
Before computer interfaces developed more technologically, they depended on text-based interfaces and learning to actually use commands in order for the person to correctly interact with the computer. This system was complex and less user-friendly. However, as the use of the computer extended, and the need for it increased, the need for easier-to-use interfaces grew. Thus, the graphical user interfase, or GUI, was born, allowing people to interact through graphics and visual icons. This simplified greatly the operation of computer systems and it also made it universal, so that, regardless of the language used, the icons and graphics are commonly understood.
It has steadily declined. The unions are not used nowadays at all. In the 70s approximately 35% of people were unionized. In 2013 only 11.5% of workers belong in a union and fight for workers rights. Unions strength has weakened because people are not interested in them.
While the war was going on, Northern writers and speakers referred to it as a “civil war” because of their belief that individual states had no right to secede from the Union.
