Learn Arabic (Modern Standard): كل المعلومات على الشاشة.

It depends on the word that comes after it! When كل is followed by a definite noun (a word starting with ال, like المعلومات), it forms an Idafa and means "all of the". If it were followed by an indefinite singular noun, it would mean "every". Since we have المعلومات (the information), كل المعلومات translates to "all the information".

In English, "information" doesn't have a plural form. Is المعلومات plural in Arabic?

Yes! Unlike English, where "information" is an uncountable concept, Arabic treats it as a plural noun. It ends in ـات, which is the regular feminine plural ending. The singular form for a single piece of information is معلومة.

Because كل المعلومات is an Idafa construction, how does that affect the word المعلومات?

In an Idafa (where two nouns are linked together to show possession or grouping), the second word is always in the genitive case. This means if you are pronouncing the formal short vowel endings, المعلومات ends with a "kasra" (an "i" sound), making the phrase "kullu al-ma'lūmāti".

Where is the word for "is" in this sentence?

Arabic doesn't use words for "is" or "are" in the present tense. You simply state the subject (كل المعلومات, "All the information") followed directly by the phrase that tells you about it (على الشاشة, "on the screen"). This creates what is known as a nominal sentence.