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...alternative notations have been developed which lend themselves to simple computer algorithms for evaluating expressions. In ''prefix'' notation, each operato ...general tutorial on prefix notation that can be used for American Computer Science League.''

...nes an object in terms of itself is said to be ''recursive''. In computer science, recursion refers to a function or subroutine that calls itself, and it is ...efficiently than they can be done recursively, many algorithms in computer science must be written recursively. The Tower of Hanoi which is referred to in on

...mbers, using 0s and 1s only, are quite unwieldy for humans. For example, a computer would need 19 bits to store the numbers up to 500,000! We use of different ...nts 4 binary bits. For example, the decimal number 53201, stored as in the computer as the binary number 10000001111000101100, is represented by the octal numb

Boolean algebra is important to programmers, computer scientists, and the general population. ...ientists, Boolean algebra is the basis for digital circuits that make up a computer's hardware. The [[Digital Electronics]] category concerns a graphical repre

...ormulated in terms of points and connections between them. For example, a computer network has PCs connected by cables, an airline map has cities connected by ...r presentation discussing graph theory as needed for the American Computer Science League and its tests.

The topic of Digital Electronics is fundamental in Computer Science and there are many videos on YouTube that teach this subject. We found the

At the heart of virtually every computer program are its algorithms and its data structures. It is hard to separate ...e courses devoted to fundamental data structures. Implementation varies by computer language, but for our purposes, they can all be represented as a list of it

...ate automatons and regular expressions as needed for the American Computer Science League and its tests.