New results on hadron spectra have been appearing in abundance in the past few years as a result of improved experimental techniques. These include information on states made of both light quarks (u, d, and s) and with one or more heavy quarks (c, b). The present review, dedicated to the memory of R. H. Dalitz, treats light-quark states, glueballs, hybrids, charmed and beauty particles, charmonium, and $b \bar b$ states. Some future directions are mentioned.
Categories: hep-ph hep-ex