A contingency table, having the same number of rows as columns, in which the definitions of the row and column categories are essentially the same, but differ, for example, by referring to different time points. With the cell (see contingency table) probability denoted by pjk, and parameters relating to rows, columns, diagonals, and individual cells by rj, ck, dl, and mjk, respectively, specialist models include:
- High-Energy Transient Explorer-2
- higher arithmetic
- higher derivative
- higher dimensions
- higher-order logic
- higher-order term
- higher‐order partial derivative
- highest common factor
- highest occupied molecular orbital
- high fidelity
- high-field-strength elements
- high frequency
- high-frequency resistance
- high-gain antenna
- high-inclination orbit
- Highland Clearances
- highlands, lunar
- high-level design
- high-level injection
- high-level language
- high-level programming language
- high-level scheduler
- high-level waste
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- highlighting