Converting PDF to Word is a great way to edit PDF documents just like any other text files. The main difficulty is to edit and, as we just found out, convert scanned PDF documents. We decided to figure out the … Continue reading →
Converting PDF to Word is a great way to edit PDF documents just like any other text files. The main difficulty is to edit and, as we just found out, convert scanned PDF documents. We decided to figure out the … Continue reading →
Keeping documents printed out on paper is a common way of storing them. However, if you need to somehow edit them, obviously you will need to transfer them into digital form. The best option here is to scan them and … Continue reading →
Keeping documents printed out on paper is a common way of storing them. However, if you need to somehow edit them, obviously you will need to transfer them into digital form. The best option here is to scan them and … Continue reading →
[What is the "Invisible Web", a.k.a. the "Deep Web"?
The "visible web" is what you can find using general web search engines. It's also what you see in almost all subject directories. The "invisible web" is what you cannot find using these types of tools.
The first version of this web page was written in 2000, when this topic was new and baffling to many web searchers. Since then, search engines' crawlers and indexing programs have overcome many of the technical barriers that made it impossible for them to find "invisible" web pages.
These types of pages used to be invisible but can now be found in most search engine results:
Pages in non-HTML formats (pdf, Word, Excel, PowerPoint), now converted into HTML.
Script-based pages, whose URLs contain a ? or other script coding.
Pages generated dynamically by other types of database software (e.g., Active Server Pages, Cold Fusion). These can be indexed if there is a stable URL somewhere that search engine crawlers can find. ]