jlkgjlfdkjlfdkj By JulioMF 1944 Tubos de vacio Period: 1944 to 1953 1ª Generación jkewhfkjwehkjfwehjfkhfejkhfkjhfwkjhkhkjfhskfhkfjsdh 1973 microchip kshjfdkshfkdmndf,fdn,dnf,shdkdhd