Portal References and Easter Eggs

[Sedako]

If you find anything else, feel free to post it here with a screen shot and I'll update it.

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Aperture Science vs Black Mesa (Here and here):

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Secret room in Testchamber 16:

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Secret room in Testchamber 17:

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Aperture Science clipboards:

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Adrian Shepherd reference in testing lab keyboards:

Alright guys, I just found a sweet little easter egg.

After you've escaped behind the scenes, you'll notice a few computers and keyboards kicking about the place. Notice something odd about the keys on the keyboard? Some of them are yellow. I cross referenced my keyboard, and the letters that are highlighted are:

E, R, I, P, A, S, D, H, and N. Notice anything weird? Those are all the letters in the name Adrian Shepard. Either there is indeed something to do with ASHPD, or this is just the folks behind portal making a joke about the misconception of ASHPD to be Adrian Shepherd.

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Cake recipe hidden in a monitor:

I found myself with a strange desire for cake after finishing Portal. Interestingly enough, the monitors had some cake references on them. So I took some screenshots, transcribed the data, and here's the result. Not 100% sure about the numbers so feel free to suggest changes. The cake does not have to be a lie, just gotta make it yourself.

1 (15.25 ounce) package chocolate cake mix
1 can prepared coconut-pecan frosting
3/4 cup vegetable oil
1 cup semi sweet chocolate chips
3/4 cup butter or margerine, softened
2/3 cups granulated sugar
3 large eggs
1 teaspoon vanilla extract
2 cups all-purpose flour
2/3 cup cocoa
1 1/4 teaspoon baking soda
1 teaspoon salt
1/4 teaspoon baking powder
1 1/3 cups water
1 to 2 (1 6-ounces each) cans vanilla frosting
Don't forget garnishes such as
fish-shaped crackers
fish-shaped candles
fish-shaped solid waste
fish-shaped dirt
fish-shaped ethyl benzene
pull and peel licorice (Thanks "The Nemesis")
fish-shaped volatile organic compounds
sediment-shaped sediment