Hangul in the context of "Input methods"

Korea is a peninsular region in East Asia consisting of the Korean Peninsula, Jeju Island, and smaller islands. Since the end of World War II in Asia in 1945, it has been politically divided at or near the 38th parallel between North Korea (Democratic People's Republic of Korea; DPRK) and South Korea (Republic of Korea; ROK). Both countries proclaimed independence in 1948, and the two countries fought the Korean War from 1950 to 1953. The region is bordered by China to the north and Russia to the northeast, across the Amnok (Yalu) and Duman (Tumen) rivers, and is separated from Japan to the southeast by the Korea Strait.

Known human habitation of the Korean peninsula dates to 40,000 BC. The kingdom of Gojoseon, which according to tradition was founded in 2333 BC, fell to the Han dynasty in 108 BC. It was followed by the Three Kingdoms period, in which Korea was divided into Goguryeo, Baekje, and Silla. In 668 AD, Silla conquered Baekje and Goguryeo with the aid of the Tang dynasty, forming Unified Silla; Balhae succeeded Goguryeo in the north. In the late 9th century, Unified Silla collapsed into three states, beginning the Later Three Kingdoms period. In 918, Goguryeo was resurrected as Goryeo, which achieved what has been called a "true national unification" by Korean historians, as it unified both the Later Three Kingdoms and the ruling class of Balhae after its fall. Goryeo, whose name developed into the modern exonym "Korea", was highly cultured and saw the invention of the first metal movable type. During the 13th century, Goryeo became a vassal state of the Mongol Empire. Goryeo overthrew Mongol rule before falling to a coup led by General Yi Seong-gye, who established the Joseon dynasty in 1392. The first 200 years of Joseon were marked by peace; the Hangul, the Korean alphabet was created and Confucianism became influential. This ended with Japanese and Qing invasions, which brought devastation to Joseon and led to Korean isolationism. After the invasions, an isolated Joseon experienced another nearly 200-year period of peace and prosperity, along with cultural and technological development. In the final years of the 19th century, Japan forced Joseon to open up and Joseon experienced turmoil such as the Kapsin Coup, Donghak Peasant Revolution, and the assassination of Empress Myeongseong. In 1895, Japan defeated China in the First Sino-Japanese War and China lost suzerainty over Korea and Korea was placed under further Japanese influence. In 1897, the centuries old Joseon was replaced by the Korean Empire with the Joseon's last king, Gojong, becoming the Emperor of the Korean Empire. Japan's further victory in the 1904–1905 Russo-Japanese War, expelled Russian influence in Korea and Manchuria. In 1905, the Korean Empire became a protectorate of the Empire of Japan. In 1910, the Empire of Japan officially annexed the Korean peninsula.

Writing systems are used to record human language, and may be classified according to certain common features.

A unicase or unicameral alphabet is a writing script that has no separate cases for its letters. Semitic abjads such as Hebrew and Arabic, Brahmic scripts such as Devanagari, Tamil and Thai, Chinese characters, Hangul and the Iberian and Georgian scripts are unicase writing systems, while scripts like Latin, Greek, Cyrillic and Armenian are bicameral, as they have two cases for each letter, e.g. B and b, Б and б, Β and β, or Բ and բ. Individual characters can also be called unicameral if they are used as letters with a generally bicameral alphabet but have only one form for both cases; for example, the ʻokina as used in Polynesian languages and the glottal stop as used in Nuu-chah-nulth are unicameral.

Most modern writing systems originated as unicase orthographies. The Latin script originally had only majuscule forms directly derived from the Greek alphabet, which were originally viable for being chiseled into stone. At the same time, everyday writing was carried out in a cursive variant of the block capitals, which during the Middle Ages evolved into new letterforms for use in running text that were more legible and faster to write with an ink pen, such as Carolingian minuscule. Originally, use of the two forms was mutually exclusive, but it became a common compromise to use both in tandem, which ultimately had additional benefits in areas such as legibility. The later minuscule became the "lowercase" forms, while the original majuscule became the "uppercase" forms.

Koreanic is a compact language family consisting of the Korean and Jeju languages. The latter is often described as a dialect of Korean but is mutually unintelligible with mainland Korean varieties. Alexander Vovin has also suggested that the Yukjin dialect of the far northeast should be similarly distinguished.

Korean has been richly documented since the introduction of the Hangul alphabet in the 15th century. Earlier renditions of Korean using Chinese characters, however, are much more difficult to interpret.

Alphabetic writing – where letters generally correspond to individual sounds in a language (phonemes), as opposed to having symbols for syllables or words – was likely invented once in human history. The Proto-Sinaitic script emerged during the 2nd millennium BC among a community of West Semitic laborers in the Sinai Peninsula. Exposed to the idea of writing through the complex system of Egyptian hieroglyphs, their script instead wrote their native Canaanite language. With the possible exception of hangul in Korea, all later alphabets used throughout the world either descend directly from the Proto-Sinaitic script, or were directly inspired by it. It has been conjectured that the community selected a small number of those commonly seen in their surroundings to describe the sounds, as opposed to the semantic values of their own languages. This script was partly influenced by hieratic, an older cursive script derived from hieroglyphs. Mainly through the Phoenician alphabet that descended from Proto-Semitic, alphabetic writing spread throughout West and South Asia, North Africa, and Europe during the 1st millennium BC.

Some modern authors distinguish between consonantal alphabets, with the term abjad coined for them in 1996, and true alphabets with letters for both consonants and vowels. In this narrower sense, the first true alphabet would be the Greek alphabet, which was adapted from the Phoenician alphabet. Many linguists are skeptical of the value of wholly separating the two categories. Latin, the most widely used alphabet today, in turn derives from the Etruscan and Greek alphabets, themselves derived from Phoenician.

In East Asian writing systems, gothic typefaces (simplified Chinese: 黑体; traditional Chinese: 黑體; pinyin: hēitǐ; Jyutping: haak1 tai2; Japanese: ゴシック体, romanized: goshikku-tai; Korean: 돋움, romanized: dodum, 고딕체 godik-che) are a type style characterized by strokes of even thickness and lack of decorations, akin to sans serif styles in Western typography. It is the second most commonly used style in East Asian typography, after Ming.

Many East Asian scripts can be written horizontally or vertically. Chinese characters, Korean hangul, and Japanese kana may be oriented along either axis, as they consist mainly of disconnected logographic or syllabic units, each occupying a square block of space, thus allowing for flexibility for which direction texts can be written, be it horizontally from left-to-right, horizontally from right-to-left, vertically from top-to-bottom, and even vertically from bottom-to-top.

Traditionally, written Chinese, Vietnamese, Korean, and Japanese are written vertically in columns going from top to bottom and ordered from right to left, with each new column starting to the left of the preceding one. The stroke order and stroke direction of Chinese characters, Vietnamese chữ Nôm, Korean hangul, and kana all facilitate writing in this manner. In addition, writing in vertical columns from right to left facilitated writing with a brush in the right hand while continually unrolling the sheet of paper or scroll with the left. Since the nineteenth century, it has become increasingly common for these languages to be written horizontally, from left to right, with successive rows going from top to bottom, under the influence of European languages such as English, although vertical writing is still frequently used in Hong Kong, Japan, Korea, Macau, and Taiwan.