Basically, C was invented to shift the assembly language like UNIX kernel code to higher level language. It also helped Oracle Database originally created in 1977 by rewriting the code and finally releasing in 1983 which has now became the World’s most popular databases.
Operating systems like Windows, Mac, Linux also run its kernel having C. Even the mobiles use the C kernel. Even the embedded systems which are being used in everyday life will be programmed in C.
All the features like portability, efficiency, reduced code, Memory Manipulations and what not? Every feature of it resulting the C-language to be evergreen language among the prevalent higher level languages.