1. A system for personal catalog and knowledge management, providing a user to collect, classify and add value to information for further effective personal knowledge management, the system comprising: a data collection module for collecting data which comprise text and images from a visible data source which provides the information; a data classification module for generating a classified catalog folder and for putting the collected data in the folder; a data commentary module, providing a description field for recording description of the data, the description providing comment on the data; and a data access module for accessing the data, the catalog folder and the description.