Depois da falta de água e de energia, vai faltar válvula: resolveram restaurar o ENIAC.
http://www.wired.com/2014/11/eniac-unearthedENIAC used common octal-base radio tubes of the day; the decimal accumulators were made of 6SN7 flip-flops, while 6L7's, 6SJ7's, 6SA7's and 6AC7's were used in logic functions.[citation needed] Numerous 6L6's and 6V6's served as line drivers to drive pulses through cables between rack assemblies.