What is "supercard"

SuperCard is a high-level development environment that runs on Macintosh computers, under OS 8 and 9, and OS X. It is inspired by HyperCard, but includes a richer language, a full GUI toolkit, and native color (as opposed to HyperCard's Apple- or third-party-supplied add-ons).

The programming language used by SuperCard is called SuperTalk, and is largely based on HyperTalk, the language in HyperCard. In addition to the core language, SuperTalk can call out to OSA-based scripting languages such as AppleScript, and shell commands. The language can be extended with so-called externals, chunks of compiled code that appear like native routines.

Programs created using SuperCard can be run inside the IDE itself, or as "standalones", which combine the user-created programs and resources with the execution engine used by SuperCard.