PEBKAC
/ˈpɛb.kæk/ · Abbreviation · Hacker Culture
Definitions
Problem Exists Between Keyboard And Chair — tech support shorthand for 'the user is the problem, not the computer.' A diplomatic way of filing a bug report against humanity.
In plain English: A polite (sort of) way that IT people say the problem is the person using the computer, not the computer itself.
Etymology
- c. 1990s
- Help desk technicians coin PEBKAC — Problem Exists Between Keyboard And Chair — as an internal code for user error
- 1990s
- Variants proliferate: ID-10T error, PICNIC (Problem In Chair Not In Computer), Layer 8 issue (above the OSI model's 7 layers)
- 2000s
- PEBKAC enters mainstream tech humor, though some argue it reflects a failure of UX design rather than user incompetence
Origin Story
Tech support's secret code for 'the user is the problem'
**PEBKAC** — "Problem Exists Between Keyboard And Chair" — is IT support slang for a user error. The term emerged from helpdesk culture in the 1990s as a coded way for technicians to classify issues that weren't caused by hardware or software failure, but by the person operating the computer.
Related terms include **PICNIC** (Problem In Chair, Not In Computer), **ID-10T error** (read it out loud: "idiot error"), and **Layer 8 issue** (the OSI model has 7 layers; layer 8 is the user). All serve the same purpose: letting support staff communicate amongst themselves that the "bug" is actually the human.
While the humor is understandable (every support technician has stories), the term reflects a tension in software design. User experience professionals argue that if the user consistently makes the same mistake, the problem isn't the user — it's the design. Don Norman's *The Design of Everyday Things* (1988) makes this case eloquently: if a door needs a "push" sign, the door is badly designed.
Coined by: IT helpdesk community
Context: IT support culture, 1990s
Fun fact: Microsoft's internal bug tracking system reportedly had a special resolution category equivalent to PEBKAC, though they used more diplomatic phrasing. The exact wording varied by team, but 'by design' and 'not reproducible' often served as polite substitutes.