... ASpect is spectrum analysis package being developed at ST ScI. We discuss the implementation of a GUI using the IRAF Object Manager, the ASpect task design, and the mechanics of performing a fit to a spectral feature with ASpect. ASpect is a spectrum and line analysis package being developed at ST ScI. ... For example, the fit library ``knows'' about the component and spectrum objects but a given spectrum or component object knows nothing of fitting. ...