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PINGSPassive Intelligent Navigation and Guidance System
References in classic literature ?
And Bill Ping and me used to rope grizzlies out of the underbrush of Cache Slough in the Sacramento Valley.
Then he had turned to the white men--to those of his own kind--only to hear the ping of bullets where he had expected words of cordial welcome.
When Mohegan had applied the bark, he freely relinquished to Richard the needle and thread that were used in sewing the bandages, for these were implements of which the native but little understood the use: and, step ping back with decent gravity, awaited the completion of the business by the other.