Unlike virtually every computer system in the world which uses a variant of ASCII, IBM mainframes and midrange systems such as the AS/400 tend to use a wholly incompatible character set primarily designed for ease of use on punched cards. (For an excellent page on punched cards, see Doug Jones's Punched Card Codes).
There are a few Keurig K-cups that DO contain calories. They fall under two categories. Brew Over Ice teas and coffees (except Twinings) and Cafe Escapes. Keurig has kept those around 60 calories each. When in doubt consider the consistency of the coffee. If it is creamy- it contains calories and most likely sugar. If it is a simple black coffee, calories are not an issue.
Just how much caffeine is in Keurig K-cup coffee? This is a commonly asked question that unfortunately does not have a precise answer Kcup coffee contains between 75-125mg of caffeine per 6 fluid ounces. I know, I know, that really is not very helpful.