Complex sentence: Later on, the Graph Layout Toolkit was adopted by Symantec for their TimeLine product, Synoptics Optivity, Sun SPARCWorks, Cisco Systems, and other companies.
Split into simpler sentences: Later on, the Graph Layout Toolkit was adopted by Symantec for their TimeLine product. Then it was adopted by SynOptics Optivity, Sun SPARCWorks, Cisco Systems, and other companies.