The primary role of Excel is analysis and visualization of data, which put less emphasis on the use of special text characters. Nonetheless, there will always be some need for special characters, both Unicode characters and diacritics in Excel.

A diacritic in English is a glyph that modifies the sound of the character to which it is attached. Examples are naïve, résumé, and saké. In other fields, glyphs modify a letter to convey a specific meaning. Examples include:

· In Statistics the sample mean is denoted by x-bar (x̄) and the sample proportion by p-hat (p̂). Examples of Unicode characters are the population mean (the lowercase Greek letter mu, μ) and the population standard deviation (the lower case Greek letter sigma, σ).

· In Economics, profit is denoted by the Greek letter pi (π).

· In Mathematics, well, in Mathematics, there are a plethora of symbols including the capital sigma (Σ) for sum and ∫ for an integral.

· Currencies are denoted by symbols such as the US Dollar ($), the Euro (€), the Japanese Yen (¥), the Chinese Yuan (元), and the Indian Rupee (₹).

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