Files with lcs file extension are history files from ACT! personal contact and calendar management program.
There are 2 other file types using
the LCS file extension!
.lcs - L0phtCrack data
.lcs - Light-O-Rama compressed sequence file
Detailed description
Software that open lcs file
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What is lcs file? How to open lcs files?
The lcs file extension is mainly related to ACT! personal contact and calendar management program from Sage, available for Microsoft Windows operating system.
This lcs file contains saved history from ACT!.
The default software associated to open lcs file:

Act! 
Company or developer:
The Sage Group plc
Act! is contact and customer manager that helps you organize contact information, manage daily responsibilities, and communicate more effectively. The latest version is 17.
Help how to open:
Use ACT! to work with *.lcs files.
How to convert:
As far as we know, this .lcs file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.
List of software applications associated to the .lcs file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open lcs file, edit lcs file, convert lcs file, view lcs file, play lcs file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting lcs files.
Software that open lcs file - ACT! history data
Programs supporting the exension lcs on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Act! for open lcs file action.
Programs that can create lcs file - ACT! history data
Programs supporting the exension lcs on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Act! for create lcs file action.
Unspecified and all other actions for computer programs working with lcs file - ACT! history data
Click on the software link for more information about Act!. Act! uses lcs file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
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