Bug — An error or flaw in software that causes unexpected behavior. "We found a bug in the login flow."

Deploy / Deployment — Releasing software or an update to a live environment. "We deployed the update on Friday."

Downtime — A period when a system is unavailable. "We had two hours of downtime during the migration."

Legacy system — Older technology still in use, often outdated. "We're replacing the legacy system with a cloud-based platform."

Scalability — The ability of a system to handle growth. "The architecture needs better scalability."

Stakeholder — Anyone with an interest in a project's outcome, not just clients. "We looped in all stakeholders before the release."

Accrual — Recognizing revenue or expenses when they're incurred, not when cash changes hands. "We use accrual accounting, so this expense is recorded this quarter."

Cash flow — The movement of money in and out of a business. "Our cash flow was tight in Q1."

Liability — Something a company owes. "Outstanding loans are recorded as liabilities."

Margin — The difference between cost and selling price, usually as a percentage. "We're operating on a 15% margin."

Fiscal year — A company's 12-month accounting period, which may not match the calendar year. "Our fiscal year starts in July."

Overhead — Ongoing business expenses not tied directly to production. "Rent and utilities count as overhead."

Escalate — To move an issue to a higher level of support or authority. "I escalated the ticket to the technical team."

Ticket — A recorded customer issue or request. "Please open a ticket for this."

Turnaround time — How long it takes to resolve or respond to a request. "Our turnaround time is 24 hours."

SLA (Service Level Agreement) — A commitment defining expected response or resolution times. "This falls outside our SLA."

Churn — The rate at which customers stop using a service. "We're seeing higher churn this quarter."

Follow up — To check back on an unresolved issue. "I'll follow up with you by Friday." (As a verb it's two words; "follow-up," as in "a follow-up email," is hyphenated as a noun or adjective.)