A method for communication in an operating system and related products are provided. The method may include the follows. An application layer of a terminal device obtains a feature sequence via applying a hash algorithm to a character string. The application layer of the terminal device transmits the feature sequence to a kernel of an operating system of the terminal device. The kernel of the operating system of the terminal device determines an operation specified by the character string according to the feature sequence and a correspondence relationship between feature sequences and operations specified by character strings.