This illustrated compilation identifies people, studios, technical companies, and terms associated with silent film comedy from about 1890-1930. More than 300 entries are biographical, including actors, studio and other corporate executives, directors and other technical personnel, inventors, etc. These sketches usually include birth and death dates and a summary of the contributions of the person to the genre; some entries include a photograph, selected filmography, and movie-magazine excerpts. For the more than 100 entries on studios and companies there is a brief history, emphasizing the firm's contribution to the development of silent film comedy. The third category of entries is quite a miscellany, including Blacks in Silent Film Comedies, Edison Kinetogram (a bulletin announcing new Edison films), Keystone Kops, Nickelodeons.