What do we call devices that help us perform tasks faster and better?

Devices that help us perform tasks faster and better are commonly referred to as machines. Machines are typically defined as structured combinations of components that work together to carry out a specific function or process. They can automate tasks, reduce the amount of physical effort needed, and enhance efficiency in performing various activities.

While tools are often considered a subset of machines, they usually refer to handheld devices that assist in the completion of tasks rather than complex systems. Instruments generally refer to tools designed for precise measurements or observations, such as those found in scientific research or medicine. Products is a broader term that encompasses all items produced for sale, which may not necessarily facilitate tasks or improve performance.

Thus, the specific capability of machines to integrate various parts to optimize task completion aligns most closely with the description given in the question.