A. drawing
B. photograph, movies
C. simulation
D. all of these
A. william fetter in 1960
B. james fetter in 1969
C. james gosling in 1991
D. john taylor in 1980
A. a light pen
B. display unit
C. bank of switches
D. all of these
A. 1960
B. 1970
C. 1980
D. 1950
A. 1960
B. 1980
C. 1970
D. 1950