One time my son was asked by his English teacher about his dad’s job. My son said his dad is working in a publishing company as pre-press manager. The teacher didn’t ask further. But for my son’s information, I explain to him that part of his dad’s job is to maintain an archive of all printed materials in portable digital file (PDF). These files are distilled and converted into PDF. You can just imagine how big these files are and retrieval is difficult without a systematized method. My husband is using a pdf page counter to manage the PDF archive. With a good PDF management system, file retrieval will be a breeze.