plug-in(An auxiliary software component that extends or enhances the features of other software); add-in(A supplemental program that can extend the capabilities of an application program); tile(One of a number of separately printed parts of an oversized publication, such as a banner or poster, that cannot be printed as a single sheet. Separate tiles can be assembled to recreate the whole publication)
COM add-in(A supplemental program with the filename extension .dll or .exe that extends the capabilities of a program by adding custom commands and specialized features)
