Country codes are short alphabetic or numeric geographical codes (geocodes) developed to represent countries and dependent areas, for use in data processing and communications. Several different systems have been developed to do this.
 The term "country code" frequently refers to international dialing codes, the E.164 country calling codes.
The naming customs of Taiwanese aborigines are distinct from, though influenced by, the majority Han Chinese culture of Taiwan.
 Prior to contact with Han Chinese, the Taiwanese aborigines named themselves according to each tribe's tradition.
 The naming system varies greatly depending on the particular tribes.
 Some tribes do not have family names, at least as part of the personal name.
ISO 3166-1 alpha-3 codes are three-letter country codes defined in ISO 3166-1, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), to represent countries, dependent territories, and special areas of geographical interest.
 They allow a better visual association between the codes and the country names than the two-letter alpha-2 codes (the third set of codes is numeric and hence offers no visual association).
 They were first included as part of the ISO 3166 standard in its first edition in 1974.
Type 3 120 mm 45 caliber naval gun was a Japanese naval gun and coast defense gun used on destroyers, submarines and torpedo boats of the Imperial Japanese Navy during World War I and World War II.
 The proper title of the gun under the Japanese naval artillery naming system is 12 cm/45 3rd Year Type naval gun.
 Other guns using this naming system are the 41 cm/45 3rd Year Type naval gun, 20 cm/50 3rd Year Type naval gun, 15.5 cm/60 3rd Year Type naval gun and the 12.7 cm/50 Type 3 naval gun.
ISO 3166-1 numeric (or numeric-3) codes are three-digit country codes defined in ISO 3166-1, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), to represent countries, dependent territories, and special areas of geographical interest.
 They are similar to the three-digit country codes developed and maintained by the United Nations Statistics Division, from which they originate in its UN M.49 standard.
 They were first included as part of the ISO 3166 standard in its second edition in 1981, but they were released by the United Nations Statistics Division since as early as 1970.
This is the list of NATO country codes.
 Up to and including the seventh edition of STANAG 1059, these were two-letter codes (digrams).
 The eighth edition, promulgated February 19, 2004, and effective April 1, 2004, replaced all codes with new ones based on the ISO 3166-1 alpha-2 codes.
 Additional codes cover gaps in the ISO coverage, deal with the imaginary countries used for exercise purposes, and designate large geographical groupings and water bodies (ranging from oceans to rivers).
 It consists of two-letter codes for geographical entities, four-letter codes for subdivisions, and lists the ISO three-letter codes for reference.
 The digrams match the FIPS 10-4 codes with a few exceptions.
.
ch is the country code top-level domain (ccTLD) for Switzerland in the Domain Name System of the Internet.
 Made available in 1987, only two years after the .
com extension, it is administered by SWITCH Information Technology Services.
ISO 3166-1 alpha-2 codes are two-letter country codes defined in ISO 3166-1, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), to represent countries, dependent territories, and special areas of geographical interest.
 They are the most widely used of the country codes published by ISO (the others being alpha-3 and numeric), and are used most prominently for the Internet's country code top-level domains (with a few exceptions).
 They were first included as part of the ISO 3166 standard in its first edition in 1974.
.
li is the Internet country code top-level domain (ccTLD) for Liechtenstein.
 The .
li TLD was created in 1993.
 The domain is sponsored and administered by the University of Liechtenstein in Vaduz.
 Registration of .
li domain names used to be managed by SWITCH, administrator of Switzerland's .
ch ccTLD.
 In February 2013, SWITCH discontinued its .
li registration service for private customers, delegating it to a number of recognized partner firms.
ISO 3166-1 is part of the ISO 3166 standard published by the International Organization for Standardization (ISO), and defines codes for the names of countries, dependent territories, and special areas of geographical interest.
 The official name of the standard is "Codes for the representation of names of countries and their subdivisions – Part 1: Country codes".
 It defines three sets of country codes:

Question: Both .li and .ch are country codes under which naming system?
Answer: Domain Name System of the Internet