The term "Poster art" describes a general category of printed 2-D artwork which is designed to be affixed to a vertical surface. Its evolution and development was (and is) closely linked to advances in printmaking processes, notably lithography and offset litho, which in turn are strongly influenced by photographic and software techniques.
Posters may consist exclusively of images, or images and text. In rare cases (eg. works of calligraphy) it may consist entirely of textual graphics.
Graphic design is art with a purpose.
It involves a creative and systematic plan to solve a problem or achieve certain objectives, with the use of images, symbols or even words. It is visual communication and the aesthetic expression of concepts and ideas using various graphic elements and tools and can use image-based designs involving photos, illustrations, logos and symbols, type-based designs, or a combination of both techniques.
Video art is an art form which relies on using video technology as a visual and audio medium.
Emerged during the late 1960s as new consumer video technology such as video tape recorders became available outside corporate broadcasting.
It can take many forms: recordings that are broadcast; installations viewed in galleries or museums; works streamed online, distributed as video tapes, or DVDs; and performances which may incorporate one or more television sets, video monitors, and projections, displaying live or recorded images and sounds.
Web design and development is an umbrella term that describes the process of creating a website.
Like the name suggests, it involves two major skill sets: web design and web development.
Web design determines the look and feel of a website, while web development determines how it functions.