A simple dropdown menu in the search bar would do it for me. When coding, select option 1, when shoping option 2 etc. On desktops this could be even pre-selecte

A simple dropdown menu in the search bar would do it for me. When coding, select option 1, when shoping option 2 etc. On desktops this could be even pre-selected for the user based on desktop activity. From the backend perspective this could be implemented with a generic url and passing parameters that engage with different parts of the search engine but the importance of the business model that supports the development of each search sub-domain should not be understated... Its hard to see how these different modes can coexist and flurish under one corporate structure