books prove that two lines are parallel
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# Parallelism between two straight lines
# Parallel tasks
# parallel capacitors
# Parallel input and output
# opposite feed parallel
# Parallel delivery
# Parallel intercourse
# parallel account
# parallel circuit
# Parallel theory between soul and body
# Parallel entry and parallel exit
# The equation representing two straight lines
# Calculating the angle between two straight lines
# In the theory of parallel lines
# Parallel and perpendicular lines
# Connecting resistors in series and parallel
# Circuit resistor and capacitor in parallel
# bit-level parallelism
# Equivalency at the instruction level
# antiparallel
