Well, browsers just display pictures and text, yet to build Chrome one needs to download gigabytes of code. Databases just keep an ordered list of records on di

Well, browsers just display pictures and text, yet to build Chrome one needs to download gigabytes of code. Databases just keep an ordered list of records on disc. Compilers just look at the code and produce another code. Web servers only need to accept connections and respond with some data. Image editors are the simplest — they just let you paint with colored pixels.