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The company attributed the improvement to strong demand in the semiconductor equipment segment as well as the acquisition of Echelon Service Co. and the inclusion of a full year 's results of operations for RTS Inc. , compared with seven months ' results for the prior year .
 Echelon Service Co., a full year 's, RTS Inc., seven months ', the prior year
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 Echelon Service Co., a full year 's, RTS Inc., seven months ', the prior year