How to Say Common IT Acronyms

API = "ay-pee-eye" — always spelled out as three letters: A-P-I.

API stands for Application Programming Interface. It is an initialism — the letters A, P, I cannot form a natural English syllable, so each letter is spoken individually.

Phonetics: /ˌeɪ piː ˈaɪ/

• A → "ay" (like the letter "a")
• P → "pee"
• I → "eye"

In conversation:

• "We expose a REST ay-pee-eye."
• "The ay-pee-eye call is returning a 404."
• "I integrated with the Stripe ay-pee-eye."

Never say: "app-ee" or "ah-pee" — these will confuse your colleagues.

Related initialisms — all spelled out the same way:

• CLI — "see-ELL-eye"
• SDK — "ess-dee-KAY"
• IDE — "eye-dee-EE"

ORM = "oh-arr-em" — spelled out as three separate letters: O-R-M.

ORM stands for Object-Relational Mapper (or Mapping). It is an initialism — the consonant cluster "ORM" could theoretically be said as a word but is universally spelled out in technical speech.

Phonetics: /ˌəʊ ɑː ˈɛm/

• O → "oh"
• R → "arr"
• M → "em"

Common ORMs you might name in a sentence:

• "We use Prisma as our oh-arr-em."
• "SQLAlchemy is a Python oh-arr-em."
• "The oh-arr-em handles all the database migrations."

Similarly spelled-out IT acronyms:

• CDN — "see-dee-EN"
• DNS — "dee-en-ESS"
• SSH — "ess-ess-AITCH"

SaaS = "sass" · IaaS = "eye-az"

These cloud delivery models have established spoken forms:

SaaS (Software as a Service) → /sæs/ → "sass"

• Rhymes with "class," "mass," "pass"
• "We moved to a SaaS model" = "We moved to a sass model"

IaaS (Infrastructure as a Service) → /ˈaɪ.æz/ → "eye-az"

• Two syllables: "eye" + "az"
• "The provider offers IaaS and PaaS" = "The provider offers eye-az and paz"

PaaS (Platform as a Service) → /pæz/ → "paz" (rhymes with "jazz" or "has")

All three as a set:

• SaaS → "sass"
• PaaS → "paz"
• IaaS → "eye-az"

These word-like pronunciations are standard. Spelling them out ("ess-ay-ay-ess") is technically correct but uncommon in natural speech.

TLS = "tee-ELL-ess" · SSH = "ess-ess-AITCH"

Both are initialisms where every letter is spoken. The stress typically falls on the final letter:

TLS (Transport Layer Security) → /ˌtiː ɛl ˈɛs/

• T → "tee"
• L → "ell"
• S → "ess"
• "We need a valid tee-ell-ess cert."

SSH (Secure Shell) → /ˌɛs ɛs ˈeɪtʃ/

• S → "ess"
• S → "ess"
• H → "aitch" (British English) — note: "haitch" is non-standard
• "Connect over ess-ess-aitch on port 22."

British English note on H: In standard British English, the letter H is pronounced "aitch" /eɪtʃ/, not "haitch." Use "aitch" in professional settings.

More security acronyms — all spelled out:

• SSL — "ess-ess-ELL"
• JWT — "jay-double-you-TEE" or "jot" (both are used)
• MFA — "em-eff-AY"

CLI = "see-ELL-eye" · SDK = "ess-dee-KAY" · IDE = "eye-dee-EE"

All three are initialisms — none can form a natural English word, so each letter is spoken individually:

CLI (Command-Line Interface) → /ˌsiː ɛl ˈaɪ/

• C → "see"
• L → "ell"
• I → "eye"
• "Run it from the see-ell-eye."

SDK (Software Development Kit) → /ˌɛs diː ˈkeɪ/

• S → "ess"
• D → "dee"
• K → "kay"
• "Download the Android ess-dee-kay."

IDE (Integrated Development Environment) → /ˌaɪ diː ˈiː/

• I → "eye"
• D → "dee"
• E → "ee"
• "I use VS Code as my eye-dee-ee."

Common mistakes:

• "klee" for CLI — there is no vowel sound to connect the letters into a syllable
• "id-ee" for IDE — the I is "eye," not the short vowel sound in "it"

Quick reference — essential IT initialisms:

• API → "ay-pee-EYE"
• CLI → "see-ell-EYE"
• SDK → "ess-dee-KAY"
• IDE → "eye-dee-EE"
• ORM → "oh-arr-EM"
• DNS → "dee-en-ESS"
• SSH → "ess-ess-AITCH"
• TLS → "tee-ell-ESS"
• SaaS → "sass"
• PaaS → "paz"
• IaaS → "eye-az"