21403
The patenting of software is highly controversial , and there are highly criticized patents involving algorithms , especially data compression algorithms , such as Unisys ' LZW patent .
 Unisys, LZW
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Unisys, LZW