empty then the device is intended for harsher environments (e.g. extended temperature range) which is also referred to as military acceptance (ВП). – Package designation (1980) (Note that the letters Э and К are not valid package designations. If this element is empty then the package is simply not specified in the designation, i.e. it could be any of the packages.) – Series (three or four digits) – Manufacturing technology (one digit): Monolithic integrated circuits: 1, 5, or 6 Monolithic integrated circuits – bare chip without package: 7 Hybrid integrated circuits: 2, 4, or 8 Other integrated circuits (e.g. thin film): 3 Multi-chip modules: 9 – For four-digit series the second digit of the number of the series has significance as well: Series for household electronics: 0 Series of analogue devices: 1 Series of operational amplifiers: 4 Series of digital devices: 5 Series of memory devices: 6 Series of microprocessor families: 8 – Number of the series (2 digits): The numbers of the series are assigned sequentially and have no further meaning. Devices in a series have some characteristic in common although it varies from one series to another which characteristic that is (e.g. logic family for logic gates, instruction set for microprocessors). – Number of the series (2 or 3 digits): The 2000 / 2010 standards do not assign a special meaning to the second digit of a 4-digit series. – Functional Group (two letters) – Group – Subgroup within the group: All groups have the subgroup П (P) for "others", that is for devices that fall into the group but not into any of the other defined subgroups. – Functional Group (2010): The functional groups for the 2010 standard are in a separate table since the change from 2000 to 2010 is far more drastic than any of the previous changes. – Variant within the functional subgroup (one to four digits): Usually the variant numbers are assigned sequentially for devices within the subgroup (e.g. ЛА1, ЛА2, ЛА3, etc.). In some series the variant number matches the last two or three digits of the designation of its Western counterpart (e.g. К500ЛК117 and MC10117). – For the 2010 standard, the variant is always 2 digits in length, with a leading zero if necessary. When there is no version letter then the variant appears to be 3 digits in length (e.g. 1906ВМ016) but the third digit is actually the package designation