"Headlines set in capital letters are significantly less legible than those set in lower case." Computing All caps typography was common on teletype machines, such as those used by police departments, news, and the United States' then-called Weather Bureau, as well as early computers, such as certain early Apple II models and the ZX81, which had a limited support for lower-case text. This changed as full support of ASCII became standard, allowing lower-case characters. Some Soviet computers, such as Radio-86RK, Vector-06C, Agat-7, use 7-bit encoding called KOI-7N2, where capital Cyrillic letters replace lower-case Latin letters in the ASCII table, so can display both alphabets, but all caps only. Mikrosha is switchable to KOI-7N1, in this mode, it can display both caps and lower-case, but in Cyrillic only. Other Soviet computers, such as BK0010, MK 85, Corvette and Agat-9, use 8-bit encoding called KOI-8R, they can display both Cyrillic and Latin in caps and lower-case. Many, but not all NES games use all caps because of tile graphics, where charset and tiles share the same ROM. Game designers often choose to have less characters in favor of more tiles. With the advent of the bulletin board system, or BBS, and later the Internet, typing messages in all caps commonly became closely identified with "shouting" or attention-seeking behavior, and may be considered rude. Its equivalence to shouting traces back to at least 1984 and before the Internet, back to printed typography usage of all capitals to mean shouting. For this reason, etiquette generally discourages the use of all caps when posting messages online. While all caps can be used as an alternative to rich-text "bolding" for a single word or phrase, to express emphasis, repeated use of all caps can be considered "shouting" or irritating. Some aspects of Microsoft's Metro design language involves the use of all caps headings and titles. This has received particular attention when menu and ribbon titles appeared in all caps in Visual Studio 2012 and Office 2013, respectively. Critics have compared this to a computer program shouting at its user. Information technology journalist Lee Hutchinson described Microsoft's using the practice as "LITERALLY TERRIBLE ... [it] doesn't so much violate OS X's design conventions as it does take them out behind the shed, pour gasoline on them, and set them on fire." In programming, writing in all caps (possibly with underscores replacing spaces) is an identifier naming convention