Forsberg was the artistic director of Almqvist & Wiksell 1942-50 and at Norstedts 1950, where he designed books. Bibeln med bilder av Rembrandt (Bible with pictures by Rembrandt) (1954) is one of Forsberg's great achievements as a designer. The book was one of the first set with Forsberg's own typeface Berling antikva (1951). Forsberg created several typefaces, including Parry (1938), Lunda (1941) and Carolus (1953), as well as logos for a number of Swedish companies, such as Swedish Radio, Volvo, Royal Library and the University of Stockholm and created the image of Stockholm City Arms that the City of Stockholm's use in its graphic identity. Forsberg also published several books: Exlibris, monogram och andra märken (Bookplates, monograms and other markings) (1981) and Mina bokstäver (My letters) (1983), Vandring bland bokstavsformer (Wandering among the letter forms) (1992) and others. In 1983 Forsberg received an honorary doctorate from the Faculty of Humanities at Uppsala University, Sweden. On his 75th birthday in 1989 the Forsberg Berling Prize was instituted, awarded to a Swedish graphic artist every year since 1991.
- Berling antikva (1952)
- Antiqua. Vandring bland bokstavsformer (Walk in the letter forms ) (1957)
- Exlibris, monogram och andra märken (Bookplates, monograms and other markings ) (1981, together with Geith Forsberg)
- Bokstaven i mitt liv (The letter in my life ) (1982)
- Mina bokstäver (My letters) (1983, together with Geith Forsberg)
- Skrift. Handledning i kalligrafi (Writing. Guide to Calligraphy) (1986)
- Bokstaven och ordet (1990, together with Geith Forsberg)
- Vandring bland bokstavsformer (Wandering among the letter forms) (1992, together with Geith Forsberg)
- Alpha Magica (Alpha Lantern) (1994, together with Geith Forsberg)
- Bokstaven som konst (The letter as art) (1996)
Typefaces designed by Forsberg
- "Grafisk manual för Stockholms stad" (PDF). City of Stockholm. Retrieved 2008-06-22.
- Lemmel, Birgitta. "The Nobel Prize Diplomas". The Nobel Foundation. Archived from the original on October 20, 2009. Retrieved 30 November 2009.
- Jaspert, W. Pincus, W. Turner Berry and A.F. Johnson. The Encyclopedia of Type Faces. Blandford Press Lts.: 1953, 1983, ISBN 0-7137-1347-X, p. 2408-249
- Some of this article was translated from the Swedish Wikipedia article at sv:Karl-Erik Forsberg