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: Kaneshige 堺金重 
Producing Area: Sakai-Osaka/ Japan
Profile: Petty
Size: 135mm
Steel Type: Stainless Steel
Steel: Silver #3 (Ginsan), Soft Stainless Clad
Handle: Khii Burnt Walnut Octagonal
Total Length: 285mm
Edge Length: 141mm
Handle to Tip Length: 155mm
Blade Height: 28mm
Thickness: 2mm
Handle Length: 130mm
Weight: 65g
Hand Orientation: Ambidextrous