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The theory incorparated in a general-purpose automatic atomic-structure program is formulated in detail. The computer program, which is called SUPERSTRUCTURE, will be published soon. SUPERSTRUCTURE can calculate term energies, intermediate-coupling energy levels, term-coupling coefficients, radiative data which includes permitted and forbidden transition probabilities, and cascade coefficients. The program uses multi-configuration type expansions. Relativistic corrections are made by means of the Breit-Pauli approximation. Special attention is paid to those features of the formulation which make it particularly suited to the computer. Such principal features are:

• 1.
  (i) Wave functions are effectively expanded in Slater determinants.
• 2.
  (ii) Expressions for the matrix elements of the relativistic operators are given in a concise form. These matrix elements are expressed in terms of coefficients c_λ lm, l′m …