There is provided an electronic system (10) for providing visible user physical feedback via at least one data token (80). The system (10) includes a computing means (50), a data store (40) coupled to said computing means (50) for at least one of inputting data and outputting data content from the store (40), and a token interfacing means (60, 70) coupled to said computing means (50) for interfacing to said at least one data token (80) detachable from the system (10), said at least one token (80) for representing data content in the store (40). The system (10) is arranged to perform operations including at least one of delete, read, write, and rearrange data content associated with said at least one token (80) to read from said at least one token (80) using the token interfacing means (60, 70) details of said data content to identify said data content and/or to record on said at least one token (80) using the token interfacing means (60, 70) one or more details of said operations so that said one or more details are optically readable from said at least one token (80) when user-inspected, thereby enabling said at least one token (80) to be a representation in tangible form of corresponding data content stored in the data store (40).