Other Weapon Abilities
Whereas most weapon abilities require you spend a perk, a handful cost no perks because their advantages are counterbalanced by a different cost. You can add or remove these abilities when creating or upgrading a weapon.
Analog: The weapon gains the analog weapon special property. This is typically appropriate for weapons that don’t rely on advanced technological mechanisms and that deal only bludgeoning, piercing, or slashing damage.
Nonlethal: The weapon gains the nonlethal weapon special property.
Operative (one-handed melee only): The weapon gains the operative weapon ability, and its damage die size decreases by one step. An operative weapon can’t also have the unwieldy ability.
Unwieldy: The weapon gains the unwieldy weapon ability, and its damage die size increases by one step. It’s rare for one-handed weapons to have the unwieldy ability.
Source
Starfinder Enhanced pg. 144