71.   Although the main operating system for the arm worked, the backup system had a problem that could cause the arm to freeze up.

72.   An expensive cooling system had to be devised and installed.

73.   Among them, traction control is an option, and the antitheft system has an engine immobilizer.

74.   And few would contend that the system has any experience at finding students like Kristen.

75.   And some systems have controls in the front seat so parents can shut things off in a disciplinary crisis.

76.   And the system has no automatic way to expand to protect workers during recesions.

77.   And with many foreign-policy analysts still expecting an eventual attack, the navigational system may yet have its trial by fire.

78.   Any blocking system would have a formidable amount of content to cover.

79.   Any such system could have ramifications on capital punishment.

80.   As a result, satellite systems would have to reduce the number of channels they offer to provide high-definition programming.