- Planning committee first meets in May. By September, the library opens at 571/2 North 69th Street. The collection moves to the McClatchy building in October.
- Library moves into its current home at the Municipal Building, Long Lane and Garrett Road.
- Sarah Sellers, last resident of the Sellers Family property known as Hoodland, dies, leaving the property to the township for a library.
- The Sellers Library Board is established and assumes joint responsibility with Upper Darby Township Library Board for both libraries.
- Hoodland is renovated and opens that summer as a public library. The Children’s Library is located on the second floor; the Adult Library on the first floor.
- The Upper Darby Township Library in the Municipal Building and the Sellers Memorial Library are formally combined into the Upper Darby Township and Sellers Memorial Free Public Library.
- Sellers Library designated as the Main Library; Municipal Library is named the Municipal Branch.
- Bookmobile service begins. Starting with a trailer pulled by a station wagon, the service grows steadily through the 60s and 70s.
- Upper Darby Township assumes responsibility for the buildings and grounds of the Sellers property from the Sellers Board
- A unified Upper Darby Township & Sellers Memorial Free Public Library Board of Directors is established.
- The Patrick J. Martin Wing of the Sellers Library opens, housing the Adult Library and work areas.
- Municipal Branch is renovated.
- Primos Branch Library opens in the Westbrook Park-Primos-Secane area of the township. Its first home is in the former offices of the Nu-Way Trash Removal Corporation.
- The Delaware County Library System is established and the Sellers/Main Library is designated an Area Resource Center.
- Bookmobile discontinued. At its retirement, the bookmobile maintained a collection of over 4000 volumes and visited every part of the township.
- The first computers are installed in the libraries, used for office and administrative work only.
- The traditional card catalog is replaced by DELPHI, an integrated computerized catalog. Patrons can now see what every Delaware County library owns.
- Primos Branch moves into the closed Primos Elementary school. The branch remains here even after the school reopened in 1992. The School and Library develop a unique relationship that lasts even after the library moved to new quarters.
- Sellers/Main receives one of the first public access Internet stations in the county from DCLS. By 2007, the UD libraries as a system offered 38 public Internet access computers, 9 computers for word processing, desktop publishing and spreadsheets, and wireless Internet access at Sellers/Main and Primos Branch.
- UD’s first computerized circulation system is installed. Over the next few years, the three branches move from stand alone systems to networked systems, and finally in 2002, to a fully integrated real time county wide circulation system.
- Primos Library relocates to its current home, the renovated Westbrook Park-Primos-Secane Fire house.
- The library begins a fundraising effort to renovate the old Sellers Barn, largely unused since the retirement of the bookmobile.