1488 is a combination of two popular white supremacist numeric symbols. The first symbol is 14, which is shorthand for the "14 Words" slogan: "We must secure the existence of our people and a future for white children." The second is 88, which stands for "Heil Hitler" (H being the 8th letter of the alphabet). Together, the numbers form a general endorsement of white supremacy and its beliefs. As such, they are ubiquitous within the white supremacist movement - as graffiti, in graphics and tattoos, even in screen names and e-mail addresses, such as firstname.lastname@example.org. Some white supremacists will even price racist merchandise, such as t-shirts or compact discs, for $14.88.
The symbol is most commonly written as 1488 or 14/88, but variations such as 14-88 or 8814 are also common.