Abstract The Guy Welch collection is a compilation of materials featuring two notable American video game companies: Sierra On-Line and Microsoft. Items in this collection include correspondence, sketches, animation cels, artwork, published advertisements, magazines, corporate records, concept design documents, and more. The bulk of the materials are from between 1990 and 1998.

Abstract The Laine Nooney Sierra On-Line collection is a compilation of company documents, game maps, game pitches, game codes, art, photographs, slides, and oral histories from past employees of Sierra On-Line. Laine Nooney, games historian and post-doctorate researcher at New York University, collected these in the course of her research.