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: MSicard 
Blacksmith: Matt Sicard
Producing Area: Toronto / Canada
Profile: Petty
Size: 120mm
Steel Type: Semi Stainless Steel
Steel: Mono AEB-L
Handle: Curly Maple & Rosewood Ferrule Octagonal
Total Length: 242mm
Edge Length: 122mm
Handle to Tip Length: 134mm
Blade Height: 26mm
Thickness: 1.5mm
Handle Length: 110mm
Weight: 47g
Hand Orientation: Ambidextrous