Link/NCT01080,01,00,tool/NCT01140,01,00,tool
Logical operators/NCT06035,06,00,tool
LookUP/NCT06050,06,00,tool/NCT06055,06,00,tool/NCT06055,06,00,book
Lycos/NCT06055,06,00,tool/NCT06055,06,00,book