Kid-Friendly Sunscreen and Sunblock. The best sunscreens and sunblock that have all of the characteristics that you would look for to protect your kids from the sun include: AVEENO Baby Natural Protection Lotion Sunscreen with Broad Spectrum SPF 50.
UML Package Diagrams Notation. Package diagram is UML structure diagram which shows packages and dependencies between the packages. Model diagrams allow to show different views of a system, for example, as multi-layered (aka multi-tiered) application-multi-layered application model.
PackageKit presumably is the utility which verifies the integrity of and installs packages. It keeps a list of packages that the Installer application [in /System/Library/CoreServices] has officially installed, and in /Library/Receipts it maintains a database of what it has installed. for applications I have uninstalled by brute force.