Quotation mark
Standard English computer keyboard layouts inherited the single and double “straight” quotation marks from the typewriter (the single quotation mark also doubling as an apostrophe), and they do not include individual keys for left-handed and right-handed typographic quotation marks. However, most computer text-editing programs provide a “smart quotes” feature (see below) to automatically convert “straight” quote marks into typographic punctuation. Generally, this “smart quote” feature is enabled by default. Some websites do not allow typographic quotation marks or apostrophes in posts (one such example being YouTube). One can skirt these limitations, however, by using the HTML character codes or entities.