To what very common consumer items do the IEC codes R6 and R03 and equivalent ANSI codes AA and AAA refer?
AAA battery AAA battery An AAA or triple-A battery is a standard size of dry cell battery commonly used in low-drain portable electronic devices. A zinc–carbon battery in this size is designated by IEC as "R03", by ANSI C18.1 as "24", by old JIS standard as "UM 4", and by other manufacturer and national standard designations that vary depending on the cell chemistry. A triple-A battery is a single cell and measures in diameter and in length, including the positive terminal button, which is a minimum . The positive terminal has a maximum diameter of ; the flat negative terminal has a
C0 and C1 control codes U+0000—U+001F (C0 controls), U+007F (delete), and U+0080—U+009F (C1 controls). Unicode only specifies semantics for U+001C—U+001F, U+0009—U+000D, and U+0085. The rest of the control characters are transparent to Unicode and their meanings are left to higher-level protocols. Unicode has no code points allocated for any controls other than the C0 and C1 ones. These are the standard ASCII control codes, originally defined in ANSI X3.4. If using the ISO/IEC 2022 extension mechanism, they are designated as the active C0 control character set with the octet sequence codice_1 (codice_2). These are the most common extended control codes. If using the ISO/IEC 2022