给出一段英文文本并要求进行自动摘要。
在下面的英文文本中选择一段，并要求GPT模型生成对该段落的摘要：

"In the past, computer programmers primarily worked on creating software for desktop and laptop computers. Now, however, much of their work is focused on developing applications for mobile devices, such as smartphones and tablets. This shift has brought about changes in the programming languages that are most commonly used today. In addition, programmers now also need to be knowledgeable about designing user interfaces that will work well on smaller screens with different resolutions."
Computer programming has shifted its focus from desktop and laptop software development to mobile application development, resulting in changes in commonly used programming languages and the need for UI design expertise for smaller screens.