Resume & ATS Glossary
This glossary defines the 20 resume and applicant-tracking-system (ATS) terms that matter most in a job search — from ATS and parsing to action verbs, keyword optimization, and resume formats — in plain English, with why each one affects whether your resume gets seen.
ATS & parsing
- Applicant Tracking System (ATS)
- Software employers use to collect, parse, store, and rank job applications before a recruiter reviews them. It organizes candidates by how well they match the job — it does not automatically reject the majority of applicants, despite the popular myth.
- ATS-friendly resume
- A resume the ATS can fully read and match: a single-column layout, standard section headings, real selectable text (never an image of text), simple formatting, and the job's keywords used where they genuinely apply to you.
- Parsing
- How an ATS reads a resume file and extracts its contents into structured fields (name, contact, work history, skills). Tables, columns, and text boxes are the most common causes of broken parsing.
- Boolean search
- How recruiters query an ATS or LinkedIn using operators like AND, OR, and NOT to filter candidates by keywords. Matching a posting's exact terms improves the odds you surface in these searches.
- ATS score
- A 0–100 estimate of how well a resume matches a specific job's keywords, structure, and completeness. Applio's free ATS checker returns a score plus the exact keywords you're missing.
Resume structure
- Reverse-chronological format
- The most common and most ATS-safe format, listing work experience newest-first. Recommended for the majority of job seekers. See the best resume format.
- Functional (skills-based) format
- A resume organized around skill groups rather than a dated work history. It obscures timelines, and both recruiters and ATS often distrust it, so it's rarely recommended.
- Combination format
- A hybrid that leads with a skills or qualifications summary above a reverse-chronological history. A reasonable middle ground for career changers.
- Resume headline
- A short line under your name stating your target title or specialty (e.g. "Senior Product Designer"). It gives the ATS and recruiter an immediate role match.
- White space
- The margins and spacing that make a resume readable and scannable. Cramped resumes are harder for both recruiters and parsers to process.
Writing & keywords
- Keyword optimization
- Including the specific skills, tools, and job titles a posting emphasizes — where they genuinely apply to you — so your resume matches how the ATS and recruiter search. See how to pass the ATS.
- Keyword stuffing
- Cramming a resume with keywords (often hidden or irrelevant) to game an ATS. Recruiters spot it instantly and it damages credibility — it is not an effective tactic.
- Action verb
- A strong past-tense verb that opens a bullet and names what you did — Led, Built, Shipped, Reduced, Designed. See the list of resume action verbs.
- Quantified achievement
- A bullet backed by a measurable result — a percentage, dollar amount, time saved, or scale (e.g. "cut deploy time 45%"). Quantified bullets rank higher and prove impact.
- Hard skills
- Teachable, measurable abilities such as programming languages, tools, or certifications. ATS keyword matching leans heavily on hard skills.
- Soft skills
- Interpersonal and work-style traits such as communication or leadership — best shown through achievements rather than simply listed.
Application documents
- Resume summary
- A 2–3 sentence pitch at the top of a resume stating who you are, your strengths, and the value you bring. Best for experienced candidates — see how to write one.
- Resume objective
- A short statement of what you're seeking, used mainly by career changers or those with little history. Frame it around the employer's needs.
- Cover letter
- A one-page letter that connects your specific achievements to a role and shows fit the resume alone can't. Tailor it to each job — see how to write a cover letter.
- CV (curriculum vitae)
- A longer, comprehensive academic document covering full research, publication, and teaching history. In the US a resume is a concise 1–2 page document; outside the US "CV" often just means resume. See resume vs CV.
Frequently asked questions
What is the single most important ATS term to understand?
Parsing. If an ATS can't cleanly parse your resume into fields, none of your keywords or achievements are read correctly. A single-column layout with standard headings and real text solves most parsing problems.
Do I need to know these terms to write a good resume?
No, but they help you make better decisions. Understanding parsing, keyword optimization, and quantified achievements is most of what separates a resume that gets seen from one that doesn't.
Is an ATS the same as a resume checker?
No. An ATS is the employer's software for managing applications. A resume checker like Applio's simulates how an ATS scores your resume against a job so you can fix issues before applying.