| classifier | See Document Classifier. |
| semantic distance | How closely related words are in terms of meaning. |
| analytics | The science of collecting, analyzing, and interpreting data to take future action based on what has (or hasn’t) worked historically. |
| file compression | The process of encoding information using fewer bits; reducing the size of the file. There are many different compression techniques. |
| link spam | Link spam is also known as comment spam, and these comments are the ones you see where the poster includes unwanted links or unrelated text. |
