okular \
$(pwd)/../sistem_robotic.pdf \
$(pwd)/../slide_robotic_1.pdf \
$(pwd)/../REF/TP101/TP101\ Materi.pdf \
$(pwd)/../REF/TP201/TP201\ Materi.pdf \
$(pwd)/../REF/TP101/TP101\ Workbook.pdf \
$(pwd)/../REF/TP201/TP201\ Workbook.pdf &