The Congress Spelling System (Malay: Ejaan Kongres) is a spelling reform of Malay Rumi Script introduced during the third Malay Congress held in Johor Bahru and Singapore in 1956. The main characteristics of the system are the use of symbols in the International Phonetic Alphabet, going by the dictum of one symbol for one phoneme, and the new proposition in the writing of diphthongs.
The innovation was originally intended to replace the Za'aba Spelling and ultimately to become a standard orthography in the Malay speaking world, but did not seem to gain acceptance in general. It was deemed impractical for use by the masses, and certain graphemes proposed by the system were not represented in the common typewriters at that time. Even then, certain groups, particularly those affiliated to the Literary Movement 1950, used the Congress graphemes for diphthongs in their own publications.

Background
In the 1950s, two different orthographies were used in the Malay-speaking world, namely the Republican Spelling System in Indonesia and Za'aba Spelling in British Malaya and Borneo. The Za'ba Spelling System, introduced in 1933, was the improvised version of the earlier orthography introduced by the British scholar, R J Wilkinson. Similarly in Indonesia, the Republican Spelling System was introduced in 1947 to replace the older Dutch Van Ophuijsen Spelling System.

The third Malay congress held in Johor Bahru and Singapore from 16 to 21 September 1956, seek to unite these two different orthographies into a single system. The new orthography, was envisioned to be a better and practical system, which is simplified and using standardized methods of spelling, and emphasized more on the use of Malay phonology system. During the congress, two proposal papers concerning the new orthography was presented by Literary Movement 1950 and Malay Language Association of University of Malaya. Literary Movement 1950, proposed a system already in use by their writers, largely based on Fajar Asia orthography introduced during Japanese occupation in 1943. Malay Language Association of University of Malaya generally rejects the use of digraphs and vehemently promotes the Indonesian spelling elements. A consensus was reached during the congress, and the new orthography was later named Ejaan Kongres (the congress spelling').

In 1957, the Congress Spelling System was published for the first time by Dewan Bahasa dan Pustaka in its language leaflet, DBP bilangan (1), with the title Kaedah Baharu Ejaan Rumi Bahasa Melayu (menurut keputusan Kongres Bahasa dan Persuratan Melayu III) (Malay for 'New Methods of Rumi Spelling of Malay Language (based on the decision of Congress of Malay language and letters III)').
Reception
The Congress Spelling System did not seem to gain acceptance of people in general. The reason was that it was not practical for use by the ordinary people and certain graphemes proposed by the system were not represented in the typewriters. Even then, certain groups, particularly those affiliated to the Literary Movement 1950 used the Congress graphemes for diphthongs in their own publications. This group even reverted to the Wilkinson style of writing the vowels in closed final syllables which was, similar to the Republican style in Indonesia.
Since the Malay sections of publishing houses were mainly manned by members of the Literary Movement 1950 or their sympathisers, the Movement's style of spelling seemed to gain a widespread currency through published works. In the meantime, the schools and the government publications were still using the Za'aba or the school system of spelling. Hence, the public became confused as to which system to follow. Language usage outside the precincts of the school reflected a state of confusion in the minds of the people in the spelling of their language using the Rumi script. It was not unusual to find several systems used in a short passage in the print media not to mention in individual writings.
The state of confusion was ended with the introduction of New Rumi Spelling in 1972, that finally united the different orthographies of the Malay-speaking world into a single system.
The system
In the third Malay Congress of 1956, a total of 16 resolutions were made for orthography, 2 resolutions for phonetics, and a resolution for Jawi alphabet. The list of letters agreed upon for the new orthography are as below. It consists of 20 traditional Malay consonants , , , , , , , , , , , , , , , , , , , and consonants , , , for adopted sounds from foreign languages.





