Kina Knowledge, using Common Lisp extensively in their document processing stack
This part is really interesting:<p>&gt; It is fast - our spatial classifier takes only milliseconds to come to a conclusion about a page (there is additional time prior to this step due to the OpenCV processing - but not too much) and identify it and doesn’t require expensive hardware. Most of our instances run on ARM-64, which at least at AWS, is 30% or so cheaper than x86-64. The s-expression structures align to document structures nicely and allow a nice representation that doesn’t lose fidelity to the original layouts and hierarchies.<p>The article also mentioned they have 3 programmers and 100k lines of code, that sounds impressive.