Precision calculations of few-body atomic and molecular systems

In this talk, I will present recent advances in high-precision calculations of few-body atomic and molecular systems, including few-body structure problems, Rydberg atoms, and long-range interactions, which have been influenced by Richard Drachman.  Some of examples are QED calculations of Li⁺ to extract lithium nuclear properties, such as the nuclear charge radii and Zemach radii,  and the exotic pionic helium atom (molecule)  π^-He⁺ with the potential to extract the π^- mass at the ppb level, once experiments progress.