People live in an era of social, enterprise-oriented, and increasingly cloud-based technology; a dramatic shift away from stand-alone isolated silos that previously dominated. Computing systems can flourish today only when built to easily exchange data and services. An application that stands alone may provide practical functionality but may not live up to the full needs of organizations, such as libraries, involved with complex computer needs. Most libraries today operate in partnership with a variety of other organizations, including their parent institutions such as universities, colleges, agencies, or local government; other peer libraries; and suppliers of all varieties. More importantly, library users access services with an ever-broader array of devices--some with desktops, laptops, smartphones, or tablets and others through some intervening application such as their academic courseware system, corporate intranet, or even social networking sites such as Facebook. This reality of interconnectedness should shape the way that libraries adopt technologies as well as guide those who create software for libraries. In this article, the author contends that an evolving transition to software architectures designed for interconnectivity is necessary if one is to find much-needed efficiencies in the way that technology support is provided for library operations and to enable the creation of end-user interfaces that deliver services on the web in more powerful and more elegant ways. This transition will happen gradually and will find momentum as libraries buy and build software that not only meets the functional requirements at hand but also embodies these much-needed qualities of interconnectedness.