Filtration is a physical process that separates solid matter and fluid from a mixture. Filter, filtering, filters or filtration may also refer to: Science and technology. Computing. Filter (higher-order function), in functional programming. Filter (software), a computer program to process a data stream. Filter (video), a software component that performs some operation on a multimedia stream. Email filtering, the processing of email to organize it according to specified criteria. Content-control software also known as an Internet filter.
https://en.wikipedia.org/wiki/Filter