Method and system for input and output of data with non-standard I/O devices for web and other applications. In one aspect, non-standard input data is received from the non-standard input device at a client, and the non-standard input data is provided as equivalent standard input data to the standard browser running on the client, so that the standard browser can submit the input data to an application running on a server in communication with the client over a network. In another aspect, a server receives a request from a user, and requested data and instructions are sent to the client, where a standard browser running on the client receives the data and instructions and the data can be sent to be output by a non-standard output device in communication with the client.