abcABC

abcabc is the six-character string formed by concatenating the sequence "abc" with itself. The string uses only the ASCII letters a, b, and c. It is notable in formal language theory for being a nontrivial repetition: it equals "abc" repeated twice, so its minimal period is 3 and it is not a primitive word. In the algebraic sense of words, abcabc can be described as w = u^2 with u = abc.

In regex and string processing, abcabc is a common example used to illustrate exact repetition patterns and how to specify repeating units, such as patterns that require two consecutive copies of "abc".

In computational tasks, it demonstrates data redundancy and can have lower Kolmogorov complexity than a random six-letter string because the content is highly regular.

Other uses: as a placeholder name or identifier in examples, there is no widely recognized concept named abcabc beyond its use as a repeated motif.