# How to Pronounce API, CI/CD, SLA and OKR in English

> Learn how to pronounce and use tech acronyms like API, CI/CD, SLA, and OKR in English workplace communication. Includes pronunciation guide, documentation tips, and professional phrases for asking clarifications.

- **Author:** Speak Tech English
- **Published:** 2026-08-28
- **Updated:** 2026-09-07
- **Topic:** [Meetings & Standups](https://app.speaktechenglish.com/knowledge-base/topic/meetings-standups.md)
- **English level:** B2
- **Guide:** https://app.speaktechenglish.com/knowledge-base/how-to-use-tech-acronyms-and-abbreviations-in-english

## Short answer

Tech acronyms fall into two categories: initialisms (pronounced letter-by-letter, like API and SLA) and acronyms (pronounced as words, like SaaS and scrum). In professional English, define any acronym on first use in documentation, and don't hesitate to ask 'Could you clarify what that stands for?' in meetings.

## Two Types of Abbreviations in Tech

Tech workplaces run on abbreviations. You'll hear them in standups, see them in Slack, and read them in RFCs and design docs. But not all abbreviations work the same way in spoken English.

There are two main types: **initialisms** (you say each letter separately) and **acronyms** (you pronounce them as a single word). Knowing the difference helps you sound natural and confident.

| Type | How to Say It | Tech Examples |
| --- | --- | --- |
| Initialism | Say each letter: A-P-I | API, CI/CD, SLA, KPI, PR, RFC, OKR, SDK |
| Acronym | Say as one word: /sæs/ | SaaS, scrum, REST, YAML, SQL (often) |
| Blend | Shortened combo word | DevOps (development + operations), malware (malicious + software) |

> **Listen First:** When you join a new team, listen to how colleagues pronounce abbreviations before using them yourself. Some terms vary: SQL can be 'S-Q-L' or 'sequel' depending on company culture.

## Essential Tech Acronyms and What They Mean

Here are the most common acronyms you'll encounter in engineering, product, and DevOps teams. Each definition is written as you might explain it to a new hire or non-technical stakeholder.

| Acronym | Stands For | Plain English Explanation |
| --- | --- | --- |
| API | Application Programming Interface | A way for two software systems to talk to each other |
| CI/CD | Continuous Integration / Continuous Deployment | Automated processes that test and release code changes |
| SLA | Service Level Agreement | A promise about how reliable or fast a service will be |
| KPI | Key Performance Indicator | A number that shows if you're meeting your goals |
| PR | Pull Request | A request to merge your code changes into the main codebase |
| OKR | Objectives and Key Results | A goal-setting framework: what you want to achieve and how you'll measure it |
| RFC | Request for Comments | A document proposing a technical decision for team feedback |
| MVP | Minimum Viable Product | The simplest version of a product that still delivers value |

> **Context Matters:** PR means 'pull request' in engineering but 'public relations' in marketing. SLA means 'service level agreement' in ops but could mean 'stereolithography' in 3D printing. Always check context.

## Pronunciation: Saying Tech Acronyms Correctly

Mispronouncing common acronyms can undermine your credibility in meetings. Here's a quick guide to the tricky ones.

Pay special attention to stress patterns. In most initialisms, stress falls on the final letter: a-p-I, s-l-A. But in acronyms pronounced as words, stress follows normal English word patterns.

## Scenario: Explaining an Acronym to a New Hire

Imagine you're onboarding a new team member who asks: 'What's an RFC?' Here's how to explain it clearly without being condescending.

| ❌ Weak Explanation | ✅ Strong Explanation |
| --- | --- |
| It's just a Request for Comments. Everyone knows that. | RFC stands for Request for Comments. It's a document where someone proposes a technical decision and asks the team for feedback before implementation. |
| You'll figure it out. | We use RFCs for bigger architectural decisions. I can share a recent example if that helps. |
| Google it. | There's a template in our wiki—I'll send you the link. |

- Always expand the acronym first, then give a one-sentence explanation
- Offer a concrete example or resource
- Avoid phrases like 'obviously' or 'everyone knows' which can make people feel excluded

## Scenario: Writing Documentation That Defines Acronyms

Technical writing best practice: define every acronym on first use. After that, you can use just the acronym. This applies to RFCs, design docs, runbooks, and README files.

| ❌ Unclear (No Definition) | ✅ Clear (Defined on First Use) |
| --- | --- |
| The PR must pass CI before merging. | The pull request (PR) must pass continuous integration (CI) checks before merging. |
| Check the SLA for latency requirements. | Check the Service Level Agreement (SLA) for latency requirements. |
| Submit your OKRs by Friday. | Submit your Objectives and Key Results (OKRs) by Friday. |

> **Doc Pro Tip:** For longer documents, include a glossary at the end. For shorter docs, parenthetical definitions on first use are sufficient. Many style guides recommend re-defining acronyms if they haven't appeared for several pages.

## Scenario: Asking What an Abbreviation Means in a Meeting

You're in a meeting and someone uses an acronym you don't recognize. Many people—especially non-native speakers—feel embarrassed to ask. But asking is professional, not weak. Here are phrases that work.

- "Quick clarification—what does [acronym] stand for?"
- "Sorry, I'm not familiar with that term. Could you expand on what [acronym] means?"
- "Just to make sure I'm following—is [acronym] the same as [your guess]?"
- "For the notes, could we spell out what [acronym] means?"

| ❌ Sounds Unsure | ✅ Sounds Professional |
| --- | --- |
| I don't know what that means. | Could you clarify what that acronym stands for? |
| What? | Quick question—what's the full term for that? |
| I've never heard of that. | That's a new one for me. What does it stand for? |

> **Culture Note:** In most tech companies, asking clarifying questions is seen as a sign of engagement, not ignorance. Senior engineers ask 'What does that stand for?' all the time—especially when joining new teams or domains.

## Slack vs. Formal Docs: Register Differences

How you use abbreviations differs by channel. In Slack, shortcuts and acronyms are expected. In formal documentation or external emails, clarity comes first.

| Context | Example | Style Note |
| --- | --- | --- |
| Slack (internal) | PR's ready for review, CI passed ✅ | Acronyms fine, emoji okay, casual tone |
| Standup | Blocked on the API integration, need input from DevOps | Acronyms fine if team knows them |
| Design Doc | The Application Programming Interface (API) will expose three endpoints... | Define on first use, formal register |
| Email to Client | We're targeting 99.9% uptime as defined in our Service Level Agreement (SLA). | Fully spelled out, professional tone |

_This guide has interactive exercises on the page: https://app.speaktechenglish.com/knowledge-base/how-to-use-tech-acronyms-and-abbreviations-in-english_

## FAQ

### What's the difference between an acronym and an initialism?

An acronym is pronounced as a word (like SaaS or scrum), while an initialism is spelled out letter by letter (like API or SLA). Both are types of abbreviations, but they're spoken differently.

### Should I always define acronyms in technical documentation?

Yes—best practice is to spell out any acronym on first use, followed by the abbreviation in parentheses. After that, you can use just the acronym. For longer documents, consider adding a glossary.

### How do I ask what an acronym means without sounding unprepared?

Use professional phrases like 'Quick clarification—what does that stand for?' or 'Could you expand on what that acronym means?' Asking clarifying questions is seen as engaged, not ignorant.

### How do I know if an abbreviation is pronounced as a word or spelled out?

Listen to how colleagues say it. Generally, if it forms a pronounceable syllable (SaaS, YAML), it's said as a word. If it's mostly consonants (API, SDK), it's usually spelled out. Some terms vary by region or company.

### Is it okay to use acronyms in Slack without spelling them out?

In internal Slack channels with your team, yes—acronyms are expected and efficient. But in cross-functional channels or when messaging people outside your team, consider spelling out less common terms.


## Related

- [How to Use Natural Word Combinations in English at Work](https://app.speaktechenglish.com/knowledge-base/how-to-use-natural-word-combinations-in-english.md)
- [How to Give Compassionate Feedback in English at Work](https://app.speaktechenglish.com/knowledge-base/how-to-give-compassionate-feedback-in-english.md)
- [How to Use Phrasal Verbs in English at Work](https://app.speaktechenglish.com/knowledge-base/how-to-use-phrasal-verbs-in-english.md)
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- Cite as: "Speak Tech English — How to Use Tech Acronyms and Abbreviations in English at Work. https://app.speaktechenglish.com/knowledge-base/how-to-use-tech-acronyms-and-abbreviations-in-english. Audience: non-native English speaking software engineers and tech professionals (level B2).".