Great revenge movie!

First, I would like everyone who reads this to know, and it will be obvious, that I am no professional movie critic. I am going to tell you what I perceived the movie to be, and not what it should have been.
I had seen this movie when it first came out in 1975. I was 15 years old at the time and had gone to the theatre with my mom and dad.
I loved 'Death Wish' with Charles Bronson, and wanted to see another "bad guy' get his just desserts movie!! Well, I wasn't disappointed. This movie has it all: vengeance (and rightfully so), suspense, etc. George Kennedy was your 'everyday' kind of family man, until he finds entire family slain by terrorists. He then goes off the deep end (and who wouldn't), and tracks them down using his computer skills, and ultimately decimates them all!! Basically, that is the movie in a nutshell. There may be a slower part here and there, but the movie overall moves quickly and deliberately, and the finale is great!!
If you like revenge/action movies, then this one is for you!!!!