A petty (utility) knife probably gets used most often after your all-purpose knives. It can be used to cut small fruits, vegetables, and even some smaller cuts of meats (any many many more things, like cutting through plastic wrapping from a grocery trip!) If you have one, for a quick meal for two, you may just get it done without a chef's knife. 

Brand: Hitohira 
Producing Area: Seki-Gifu/ Japan
Profile: Petty
Size: 120mm
Steel Type: Stainless Steel
Steel: Mono VG10
Handle: Pakka Western
Total Length: 232mm
Edge Length: 125mm
Handle to Tip Length: 128mm
Blade Height: 28mm
Thickness: 1.5mm
Handle Length: 104mm
Weight: 75g
Hand Orientation: Right-Handed
Hardness: 60±0.5HRC