 <unk> machines were built in antiquity and improved throughout history by many mathematicians , including ( once again ) philosopher Gottfried Leibniz . In the early 19th century , Charles <unk> designed a programmable computer ( the Analytical Engine ) , although it was never built . <unk> <unk> speculated that the machine " might compose elaborate and scientific pieces of music of any degree of complexity or extent " . ( She is often credited as the first programmer because of a set of notes she wrote that completely detail a method for <unk> <unk> numbers with the Engine . ) 
