GitHub - alessiomeloni/blackjack-strategy-calculator: This blackjack coach will provide you with the optimal move based on your cards and the dealer's cards, using the Hi-Lo system, Betting Deviations, and Playing Deviations strategies.
![File:Unisonic 21 Blackjack Computer Console With Calculator, with package, Model 21-D3 (aka Model D-3), VFD, "Play and Enjoy Unsonic 21 With Jimmy the Greek", Made in Taiwan, Copyright 1977 (Electronic Game).jpg - File:Unisonic 21 Blackjack Computer Console With Calculator, with package, Model 21-D3 (aka Model D-3), VFD, "Play and Enjoy Unsonic 21 With Jimmy the Greek", Made in Taiwan, Copyright 1977 (Electronic Game).jpg -](https://upload.wikimedia.org/wikipedia/commons/d/dd/Unisonic_21_Blackjack_Computer_Console_With_Calculator%2C_with_package%2C_Model_21-D3_%28aka_Model_D-3%29%2C_VFD%2C_%22Play_and_Enjoy_Unsonic_21_With_Jimmy_the_Greek%22%2C_Made_in_Taiwan%2C_Copyright_1977_%28Electronic_Game%29.jpg)
File:Unisonic 21 Blackjack Computer Console With Calculator, with package, Model 21-D3 (aka Model D-3), VFD, "Play and Enjoy Unsonic 21 With Jimmy the Greek", Made in Taiwan, Copyright 1977 (Electronic Game).jpg -
![Amazon.com : Tandy Corporation Radio Shack Electronic Blackjack Calculator Led Handheld Game Model#ec-21 Complete, with Manual, with Cover and Calculator : Office Products Amazon.com : Tandy Corporation Radio Shack Electronic Blackjack Calculator Led Handheld Game Model#ec-21 Complete, with Manual, with Cover and Calculator : Office Products](https://m.media-amazon.com/images/I/51yeOcTbdUL.jpg)