Hybrid mode deploys two graphics cards in combination. When in hybrid mode, a less powerful but energy-saving graphics card is used for 2D applications. A more powerful graphics card takes over when it comes time for 3D work, however. The classic combination includes an onboard graphics card paired with a supplementary high-end graphics card.
A computer's hard drive is often referred to solely as the HDD. This stands for "Hard Disk Drive". It is used to store data for recall and editing at any time.