Disk file manipulation.
make System.file(name, mode): Opens a file.stderr: Standard error.stdin: Standard input.stdout: Standard output.close(): Closes file and prevents further operations on this object.exists(path): Checks to see if there is a file at the given path.read(bytes): Read a stream of bytes into a string.readline(): Read a single line of text into a string.seek(pos): Move current position in file.size(path): Returns the size of the file at the given path.tell(): Return current position in file.write(string): Write string to file.