Palindrome (; "again") and ' (; "way, direction"). Palindromes date back at least to 79 AD, as a palindrome was found as a graffito at Herculaneum, a city buried by ash in that year. This palindrome, called the Sator Square, consists of a sentence written in Latin: "Sator Arepo Tenet Opera Rotas" ("The sower Arepo holds with effort the wheels"). It is remarkable for the fact that the first letters of each word form the first word, the second letters form the second word, and so forth. Hence, it can be arranged into a word square that reads in four different
Principle of least effort learning students. This means that modern libraries, especially academic libraries, need to analyze their electronic databases in order to successfully cater to the needs of the changing realities of information science. Professional writers employ the principle of least effort during audience analysis. The writer analyzes the reader's environment, previous knowledge, and other similar information which the reader may already know. In technical writing, recursive organization, where parts resemble the organization of the whole, helps readers find their way. Consistency of navigational features is a common concern in software design. Principle of least effort The principle of least effort is a