We claim the ornamental design for a notebook computer, as shown and described.
FIG. 1 is a front perspective view of a notebook computer showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left-side view thereof;
FIG. 5 is a right-side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a rear perspective view thereof; and,
FIG. 9 is an enlarged view of the encircled portion in FIG. 1.
The evenly spaced dashed broken lines in the figures depict portions of the notebook computer which form no part of the claimed design.
The dot-dash broken lines in FIGS. 1 and 9 encircling portions of the drawing disclosure illustrated in an enlargement form no part of the claimed design.