An emulation system that allows a user to create a script is provided. The emulation system emulates a handheld computing device, such as a calculator, on an electronic device such as a personal computer. The script, which includes an input sequence, may be recorded and played back at a later time. In a preferred embodiment, annotations may be added to the script to help explain the concepts being illustrated by the script. The annotation may include text, graphics, audio, and/or video. Upon playback, the input sequence recorded in the script is used as input to the emulator. The playback may be automated or performed one step at a time, thereby allowing the student to step through the script and study intermediate results. The input sequence may represent, for example, digits, commands (e.g., store, recall, graph, list, print, etc.), or functions (e.g., x.sup.2, x.sup.3, compute, tan, sin, cos, etc.).