Albert Lawrence "Larry" Luther (1895-1966) was a powerhouse operator for Southern California Edison Co. (SCE), a utility company that in 1917 merged with Pacific Light and Power Corporation. The centerpiece of the merger transferred ownership of the Big Creek hydroelectric project to SCE. Big Creek eventually became one of the world's largest hydroelectric projects. Luther's photograph album is from his time working for Southern California Edison Co. during the Big Creek hydroelectric project between 1917 and 1920. The images depict work and leisure, with captions written by Luther between 1917 and 1920.

Conectiv, Inc. is a holding company formed in 1998 by the merger of Atlantic Electric Incorporated and Delmarva Power and Light Company, two large regional power utilities that supplied Southern New Jersey and the Delmarva Peninsula. The majority of the images in this collection come from the Delmarva Power and Light Company (DP&L), a predecessor of Conectiv, Inc. The images can generally be divided into three categories: DP&L equipment and facilities, DP&L employees, and views of buildings, both commercial and residential, throughout northern Delaware.

Delmarva Power and Light Company is a regulated energy company that provides electricity and natural gas services to customers in the Delmarva Peninsula. These 1926 images document the construction of gas towers and substations at the Christiana and Brandywine power plants in the Wilmington, Delaware.

The Edison Electric Institute is the trade association of the electric utility industry. The minutes of the Institute's Transmission and Distributing Committee (1935, 1941-1970) include both business transactions of the committee and professional papers of representatives of member utility companies on a variety of subjects related to the transmission and distribution of electricty.

Levi C. Stang (1890-1962) was an electrical engineer and general manager of several electric companies throughout the Midwest. His scrapbook chronicles his career and employment as an electrical engineer through selected letters and correspondence, newspaper and other clippings, blueprints, and photographs.

The Pennsylvania Power & Light Co. is an energy utility and transmission distributor based in Allentown, Pennsylvania. This small collection consists of a course book from a Pennsylvania Power & Light Company lighting workshop held in the fall of 1957.

The Pennsylvania Power & Light Co. is an energy utility and transmission distributer based in Allentown, Pennsylvania. Arising from a business merger, the company was founded on June 4, 1920, and soon after began providing energy to eastern and central Pennsylvania. Renamed PP&L Corporation circa 1995, the company continues to operate as an energy provider within northeastern Pennsylvania. The collection consists primarily of photographs that depict sites of various PP&L subsidiaries and those directly operated by the company. It is a resource that can be used for insight into PP&L's early operations and eastern and central Pennsylvania industrial development. Images within this collection range from 1920 to 1973. Researchers interested in electric power transmission and its development within the state of Pennsylvania would find this collection useful.

Pennsylvania Power & Light Company formed in 1920 through the consolidation of eight electric utilities companies serving central and eastern Pennsylvania. The collection primarily includes corporate papers documenting the company’s acquisition of various competing electric companies in the early-to-mid twentieth century by way of franchise building, market research and corporate communications, hydroelectric development through studies and surveys on Pennsylvania’s waterways, and material documenting the company’s various power plants in central eastern Pennsylvania. Financial and accounting records of the Pennsylvania Water & Power Company, which PP&L acquired in 1955, are also included.

The Pennsylvania Water & Power Company formed in 1910 to finish construction of the Holtwood hydroelectric facility along the lower Susquehanna River in Pennsylvania. The company achieved numerous advancements in hydroelectric and steam power development in the early twentieth century, and helped bring about the electrification of Baltimore and, later, much of the Chesapeake and eastern Pennsylvania area. The records largely consist of correspondence to and from Pennsylvania Water & Power's chief engineer and later president, John Abbet Walls, and other company heads relating to operations, customers, dam construction, and numerous subjects associated with the hydroelectric industry.

The Philadelphia Electric Company was incorporated under the laws of Pennsylvania on October 31, 1929, as a merger of The Philadelphia Electric Company (incorporated in Pa. on October 27, 1902), the Philadelphia Suburban-Counties Gas & Electric Company, and three other small utility companies. It is the primary gas and electric company for Philadelphia, its surrounding counties and Cecil and Harford Counties in northeastern Maryland. Their records consist of microfilm copies of the minute books of about 150 of the predecessor companies of the Philadelphia Electric Company.

The Stanton steam-generated power plant began operation at Harding, Pennsylvania in 1927. It was run by the Scranton Electric Company, which was later acquired by the Pennsylvania Power & Light Company. Most of the photographs in this collection are snapshots showing the plant and employees between 1934 and 1936. There are many that show a flood which took place on March 17, 1936. The three newspaper clippings report on the demolition of the plant between 1973 and 1976.

Thomas Parke Hughes (1923-2014), was one of the leading historians of technology of his era. This collection consists of files relating to the research and production of Professor Hughes' two prize-winning books, Networks of Power, and Elmer Sperry: Inventor and Engineer. Also included are Elmer Sperry's original desk diaries.