The ornamental design for a notebookcomputer, as shown and described.
FIG. 1 is a 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 plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a top-front perspective view of a notebook computer of FIG. 1, in which a display part of the notebook computer rotates on a hinge; and,
FIG. 9 is another top-front perspective view of a notebook computer of FIG. 1, in which a display part of the notebook computer rotates on a hinge.
The broken line is for environmental purposes only and forms no part of the claimed design. The shade lines in the figures show contour and not surface ornamentation. The diagonal shading lines in FIGS. 1, 6, 8, and 9 represent a reflective surface.