Cord UIs are sensorial augmented cords that allow for simple, metaphor-rich interactions to interface with their connected devices. Cords offer a large, under-explored space for interactions, as well as unique properties and a diverse set of metaphors that make them potentially interesting tangible interfaces. We use cords as input devices and explore different interactions like tying knots, stretching, pinching, and kinking to control the flow of data and/or power. We also look at ways to use objects in combination with augmented cords to manipulate data or properties of a device. For instance, placing a clamp on a cable can obstruct the audio signal to the headphones. Using special materials such as piezo copolymer cables and stretchable cords, we built five working prototypes to showcase these interactions.