Indonesian does not punctuate every shortened form in the same way. Sdr. “Mr./Ms.; fellow person addressed” and hlm. “page” take periods, but capital initialisms such as DPR and KTP do not. Pronounceable acronyms can also become ordinary lowercase words, as pemilu “general election” has.
The system classifies shortened forms by function and structure. A period may identify a title or a conventional document abbreviation; capitals may show that a form consists of initials; lowercase may show that an acronym has become an ordinary lexical item. This page covers those written signals, not the detailed pronunciation or derivational meaning of each form. Ordinary Indonesian requires no accent marks on abbreviations or acronyms.
Titles and forms of address take periods
An abbreviation of a personal name, academic or professional title, form of address, or rank is followed by a period at each abbreviated element. The required form Sdr. abbreviates Saudara and ends in one period.
Surat itu ditujukan kepada Sdr. Budi Santoso.
The letter is addressed to Mr. Budi Santoso.
Silakan hubungi Prof. Ratna jika ada pertanyaan.
Please contact Professor Ratna if you have any questions.
| Abbreviation | Full form | Pattern |
|---|---|---|
| Sdr. | Saudara | one shortened element + period |
| dr. | dokter | professional title + period |
| Prof. | profesor | title + period |
| S.E. | sarjana ekonomi | period after each abbreviated element |
Capitalization can distinguish forms: dr. is the professional title “medical doctor,” while Dr. is the academic title “doctor.” The period does not settle capitalization; learners must preserve the conventional title form.
Conventional document abbreviations
Common abbreviations of more than two letters used in documents or correspondence normally take one final period. The required example hlm. means halaman “page.” Other frequent forms are dll. “and others,” dkk. “and colleagues,” dsb. “and so forth,” and yth. “honorable; addressed to.” This is especially relevant in formal correspondence, references, and administrative text (formal).
Penjelasan lengkap tersedia pada hlm. 27.
The full explanation is available on page 27.
Daftar nama, alamat, nomor telepon, dll. sudah diperbarui.
The list of names, addresses, telephone numbers, etc. has been updated.
Conventional two-letter document abbreviations follow another pattern: each letter takes a period, as in a.n. (atas nama) and s.d. (sampai dengan). Address abbreviations such as Jl. “Jalan,” No. “Nomor,” and Gd. “Gedung” end in a period.
Dokumen itu ditandatangani a.n. kepala dinas.
The document was signed on behalf of the department head.
The honest difficulty is lexical. You cannot determine the punctuation merely by counting letters in every imaginable shortened form; the form must also belong to the relevant conventional category. Learn frequent administrative abbreviations as complete units.
All-capital initialisms have no periods
A shortened form made from the initial letters of its words is written in capitals without periods. DPR stands for Dewan Perwakilan Rakyat, and KTP stands for kartu tanda penduduk. The same pattern appears in PBB, UI, WHO, and SIM.
DPR akan membahas rancangan undang-undang itu pekan depan.
The House of Representatives will discuss the bill next week.
Petugas meminta saya menunjukkan KTP.
The officer asked me to show my identity card.
English has varied historical styles such as U.S., U.S.A., and USA. Do not import that optional punctuation into Indonesian. Standard forms are DPR, not D.P.R., and KTP, not K.T.P.
Initials used for a person's name are likewise written without periods under EYD V, such as STA for Sutan Takdir Alisjahbana. That convention differs from title abbreviations such as S.E.; once again, classification matters.
Pronounceable acronyms and capitalization
An acronym built from initials, letter groups, or syllables may be pronounced as a word. Its capitalization depends on whether it is a proper name.
| Type | Standard examples | Capitalization |
|---|---|---|
| proper-name acronym | Bappenas, Bulog, Suramadu | initial capital |
| non-proper acronym | pemilu, puskesmas, rudal, tilang | lowercase |
| initial-letter form | DPR, KTP, PBB | all capitals, no periods |
Pemilu akan dilaksanakan serentak di seluruh wilayah.
The general election will be held simultaneously throughout the country.
Bappenas menerbitkan laporan pembangunan terbaru.
Bappenas published the latest development report.
The lowercase spelling of pemilu is not casual shorthand. It shows that a pronounceable institutional expression has become an ordinary common noun. This is the distinguishing insight: origins in an official multiword phrase do not force permanent capitals.
Affixes and clitics on capitals need a hyphen
When an Indonesian affix or clitic attaches to an all-capital form, a hyphen marks the boundary between unlike graphic elements. Write ber-KTP “to possess an identity card” and KTP-nya “his/her/their identity card.” EYD V also gives patterns such as di-SK-kan and KTP-mu.
Semua penghuni dewasa di rumah itu sudah ber-KTP.
All adult residents of that house have identity cards.
KTP-nya tertinggal di meja layanan.
His/Her identity card was left at the service desk.
The hyphen does not mean that ber- or -nya is optional punctuation. It preserves the visible border between lowercase grammatical material and a capital initialism. Writing berKTP or KTPnya hides that boundary; writing ber KTP incorrectly turns the bound affix into a separate word.
Units and currency symbols are another category
Abbreviations for units, measures, chemical symbols, and currencies do not take periods: km, kg, l, Cu, and Rp. Their spacing with numbers is covered on the numbers page. Do not infer that every short lowercase form needs a period.
Digital writing often drops periods from titles or document abbreviations (informal), but edited emails, applications, and reports should preserve the standard forms (formal), as should academic prose (academic). Acronyms themselves need no accents, even if a writer wishes to show stress or pronunciation.
Common Mistakes
1. Omitting the period from a form of address
❌ Surat ini ditujukan kepada Sdr Ahmad.
Incorrect standard spelling — Sdr. is a form-of-address abbreviation and takes a final period.
✅ Surat ini ditujukan kepada Sdr. Ahmad.
This letter is addressed to Mr. Ahmad.
2. Punctuating every letter of a document abbreviation
❌ Lihat penjelasannya di h.l.m. 12.
Incorrect — hlm. has one period at the end, not one after every letter.
✅ Lihat penjelasannya di hlm. 12.
See the explanation on page 12.
3. Copying dotted English-style initials
❌ D.P.R. sedang mengadakan rapat.
Incorrect Indonesian punctuation — capital initialisms take no periods.
✅ DPR sedang mengadakan rapat.
The House of Representatives is holding a meeting.
4. Removing the hyphen before a lowercase clitic
❌ KTPnya masih berlaku sampai tahun depan.
Incorrect standard spelling — attach -nya to capitals with a hyphen.
✅ KTP-nya masih berlaku sampai tahun depan.
His/Her identity card remains valid until next year.
5. Keeping an ordinary acronym in full capitals
❌ Partisipasi dalam PEMILU meningkat.
Incorrect in ordinary running text — pemilu is a non-proper acronym written lowercase.
✅ Partisipasi dalam pemilu meningkat.
Participation in the election increased.
Key Takeaways
- Titles and forms of address such as Sdr. take periods.
- A document abbreviation of more than two letters, such as hlm., normally takes one final period.
- Initialisms such as DPR and KTP use capitals without periods.
- Proper-name acronyms take an initial capital; ordinary acronyms such as pemilu are lowercase.
- Use a hyphen when lowercase affixes or clitics meet capitals: ber-KTP and KTP-nya.
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