Computer engineering encompasses the design, development, and application of computer systems and software. It integrates principles from electrical engineering and computer science to create hardware and software solutions. The distinction between a computer programmer and a software engineer lies in their roles; programmers primarily focus on writing code, while software engineers are involved in developing algorithms and solving complex programming problems. In web development, a web-designer is responsible for the visual aspects of a website, including layout and graphics, and typically knows HTML, CSS, and JavaScript. In contrast, a web-developer engages in programming and may work with languages such as PHP, Python, or Java, focusing on the functional aspects of web applications. The terms "developer" and "designer" can sometimes be used interchangeably, but their core responsibilities differ significantly.