A method for contents management by a processor of an electronic device, comprising: generating a contents list, wherein generating the contents list comprises collecting contents created using at least one of a plurality of applications installed on the electronic device when generating the contents list; detecting selection of a contents list entry in the contents list based on a user input, reading (407, 617) the content of the selected contents list entry, extracting identification information from at least part of the read content, executing an editor in response to a user input, and creating one or more contents related to the content of the selected contents list entry according to a user input based on the executed editor, wherein the content of the selected contents list entry is related to a first application and the one or more contents related to the content of the selected contents list entry are related to one or more second applications different from the first application; generating (411, 1003) a tag comprising the extracted identification information corresponding to the selected contents list entry and adding the tag to the one or more related contents when creating the one or more related contents; adding a contents list entry of the one or more related contents comprising the tag, to the contents list; and wherein reading the content of the selected contents list entry comprises: detecting, based on the tag comprising the extracted identification information corresponding to the selected contents list entry, whether there are the one or more related contents; upon detecting the one or more related contents, displaying an indicator indicating presence of the one or more related contents when displaying the content of the selected contents list entry, wherein in response to a detection of a selection of the indicator, simultaneously display on a single screen of the electronic device (a) the content of the selected contents list entry in a first scrollable display region, and (b) a list of contents list entries of the one or more contents related to the content in a second scrollable display region. generating a contents list, wherein generating the contents list comprises collecting contents created using at least one of a plurality of applications installed on the electronic device when generating the contents list; detecting selection of a contents list entry in the contents list based on a user input, reading (407, 617) the content of the selected contents list entry, extracting identification information from at least part of the read content, executing an editor in response to a user input, and creating one or more contents related to the content of the selected contents list entry according to a user input based on the executed editor, wherein the content of the selected contents list entry is related to a first application and the one or more contents related to the content of the selected contents list entry are related to one or more second applications different from the first application; generating (411, 1003) a tag comprising the extracted identification information corresponding to the selected contents list entry and adding the tag to the one or more related contents when creating the one or more related contents; adding a contents list entry of the one or more related contents comprising the tag, to the contents list; and wherein reading the content of the selected contents list entry comprises: detecting, based on the tag comprising the extracted identification information corresponding to the selected contents list entry, whether there are the one or more related contents; upon detecting the one or more related contents, displaying an indicator indicating presence of the one or more related contents when displaying the content of the selected contents list entry, generating (411, 1003) a tag comprising the extracted identification information corresponding to the selected contents list entry and adding the tag to the one or more related contents when creating the one or more related contents; adding a contents list entry of the one or more related contents comprising the tag, to the contents list; and wherein reading the content of the selected contents list entry comprises: detecting, based on the tag comprising the extracted identification information corresponding to the selected contents list entry, whether there are the one or more related contents; upon detecting the one or more related contents, displaying an indicator indicating presence of the one or more related contents when displaying the content of the selected contents list entry, detecting, based on the tag comprising the extracted identification information corresponding to the selected contents list entry, whether there are the one or more related contents; upon detecting the one or more related contents, displaying an indicator indicating presence of the one or more related contents when displaying the content of the selected contents list entry, wherein in response to a detection of a selection of the indicator, simultaneously display on a single screen of the electronic device (a) the content of the selected contents list entry in a first scrollable display region, and (b) a list of contents list entries of the one or more contents related to the content in a second scrollable display region.