What Is a Laptop?
A laptop — also called a notebook computer — is a portable personal computer that packages the display, keyboard, pointing device, battery and all internal computing components into a single foldable chassis. Unlike a desktop tower, which depends on separate peripherals and a mains supply, a laptop is designed to be carried and used almost anywhere, running from an internal battery for hours at a time. The defining traits of a laptop are therefore portability, an integrated user interface (screen plus keyboard), and self-contained power.
Technically, a laptop is still a general-purpose computer built around the same architecture as any other PC: a processor, chipset, main memory, storage, graphics, networking and I/O, all coordinated by an operating system. What changes is the packaging. Laptops use mobile-class processors and memory modules tuned for lower power draw, flat-panel displays, M.2 solid-state storage, and carefully managed thermal designs so that heat can be dissipated from a thin enclosure.
Key Specifications That Define a Laptop
| Component | Typical laptop range | Notes |
|---|---|---|
| Display | 11" to 17" | Integrated flat panel; touch optional |
| Processor | Mobile Intel Core / Celeron / N-series, AMD Ryzen, ARM SoC | Lower TDP than desktop parts to protect battery life |
| Memory | 4 GB to 64 GB | Often soldered or as one or two SO-DIMM slots |
| Storage | 128 GB to 2 TB NVMe SSD | M.2 form factor for compactness |
| Battery | 40 Wh to 100 Wh | Runtime typically 4–12 hours |
| Weight | 1 kg to 3 kg | Ultrabooks at the low end, workstation laptops at the high end |
| Ports | USB-A, USB-C, HDMI, audio | USB-C often carries power and video |
| Wireless | Wi-Fi and Bluetooth | Built-in by default |
| Operating system | Windows, Linux |
