Between the 1970's and the 2000's there are so many programming languages, it seems nigh impossible to list all of them. But, of course, there's always the most important or the most popular, and a lot of times the most important/most popular are the same languages, just maybe in a different order. The 1970's seen a quick advancement in computers and their languages due the the creation of the microprocessors. This era's programming history is marked by C, Pascal, Smalltalk, Scheme and Prolog The C programming language is the basis for many others. It's one of the singly most important building blocks of many of the languages used today. C was created in 1971, though it's roots go back to 1954's Fortran. However, it's direct predeccessor was B in 1969. C was created as a compiler to more easily install OS's on computers. It made it possible to the few system-dependent requirements and then use a C compiler to install the new OS. Bell Lab's Ken Thompson was behind the original B, then him and Dennis Ritchie, also of Bell Labs, improved upon it for the NB language. The evolution of NB led naturally to C. Pascal is another language that is the basis of many others, and many of the languages used commonly now have it somewhere in their developmental line. Pascal was named for Frenchman Blaise Pascal, a pioneer mathematician, that had created the first arithmetic machine. That machine could, arguably, be considered the first computer. Niklaus Wirth had written the first version of the Pascal language in 1970 with the goals of having an easily teachable language and also having a reliable and efficient implementation. Smalltalk was another popular language in the 1970's whose remnants are still seen today. It was the first of the object-oriented programming languages. There were many designers behind this language, and many have gone nameless. It was designed for