it depends on the Ritual Card...if it says it Ritual summons the monster from your hand, you need to have it in your hand.
Generally, memory card readers have four or five slots that fit multiple types of memory cards.
You are only allowed 11 cards as a maximum on a field, you have five monster card slots, five spell/trap slots, and a Field Spell Card slot.
You're confusing a type of card with an archtype. Archtypes like x-sabers and xx-sabers are just cards which share part of their name and are often used together. Ritual cards are monsters with a blue card back which are summoned using ritual spells- they're a whole different type of card in the own right. In summary, no the djinn archtype and ritual spells are not considered ritual monsters.
media reader/ card reader/ memory card, reader or writer
No, only from your hand. They can be special summoned from graveyard by cards like Monster Reborn if they were properly summoned initially before they went there. However you can't resummon them from the graveyard with their Ritual Spell Card.
Ritual Spell Cards are used to summon (usually powerful) Ritual Monsters. In terms of timing, they're played just like normal spell-speed 1 spells. Ritual cards will usually require that you tribute monsters whose combined levels are equal or greater to the Ritual Monster you are trying to summon.
Not necessarily. The phone will have to specifically say it accepts sdhc cards.
No, PCI Cards will not fit on PCI-E slots
Yes, provided that you have two physical memory card slots on your computer or two card readers.
Communications and Networking Riser card, usually found on PCchips and ASRock motherboards.
TF card slots are smaller than standard SD card slots. There is no difference between TF card slots and microSD card slots. Small SD cards were originally marketed as "TransFlash" before the format was officially approved by the Secure Digital Alliance. The "TF" branding is mostly used on older devices, or on devices where the manufacturer didn't want to pay for licensing the SD card trademark.
The AGP slot was primarily used for graphics cards. These have been phased out by PCI Express slots.