21.   Schiller said on-line programming may include conferences, blues reference works, biographies and information on coming albums.

22.   Shareware applications also mirror much of commercial software with word processing, database and spreadsheets, utilities, communications, desktop publishing, graphics and even reference works.

23.   She contributed entries to national and international reference works.

24.   That opens access to all reference works.

25.   The articles in the six reference works are easy to read, and if you place the cursor on a highlighted word, a definition appears.

26.   The Daily Digital will surely seek income by collecting fees for reprints from its archives or for searches of reference works and other databases.

27.   The other three titles are all reference works.

28.   Two books residing together in my bedroom bookcase are among my most referenced reference works, and by their contrast often fill me with wonder.

29.   What I like best are reference works on CD.

30.   When it was released, it was a unique and needed program that combined several reference works under one easy-to-use roof.