CREATE TABLE table_204_577 (id NUMBER, "name" CLOB, "first operational" CLOB, "numeral system" CLOB, "computing mechanism" CLOB, "programming" CLOB, "turing complete" CLOB)

the edsac and the manchester mark 1 both had what type of computing mechanism ?
SELECT "computing mechanism" FROM table_204_577 WHERE "name" = 'edsac'
SELECT "computing mechanism" FROM "table_204_577" WHERE "name" = 'edsac'