From Invention to Production: The Development of Punched-card Machines by F. R. Bull and K. A. Knutsen 1918-1930. - Lars Heide (IEEE Ann. Hist. Comput., 1991)

Shaping a Technology: American Punched Card Systems 1880-1914. - Lars Heide (IEEE Ann. Hist. Comput., 1997)

Concluding Remarks. - Tomas Ohlin; Lars Heide; Nils Høeg; Martti Tienari (History of Nordic Computing, 2003)

Making Business of a Revolutionary New Technology: The Eckert-Mauchly Company, 1945-1951. - Lars Heide (History of Nordic Computing, 2010)

Scale and Scope in American Key-Set Office Machine Dynamics, 1880s-1930s. - Lars Heide (IEEE Ann. Hist. Comput., 2011)

From the Editor's Desk. - Lars Heide (IEEE Ann. Hist. Comput., 2012)

Early Punched Card Equipment: 1880-1951 [Scanning Our Past]. - Emerson W. Pugh; Lars Heide (Proc. IEEE, 2013)