PACKs is an SR4 concept...there it was a way of having a set amount of BP to buy a package of equipemt (no discount, just a package of useful stuff...)
As an example these are from my current character gen sheet (I'll format it properly when I have a sec, lunch is over for now

):
Runner Survival Kit Cost:5,030¥ Avail:8R Package:Micro Transceiver & Subvocal Mic, Respirator [4], Lowlight Flashlight, Metalink Disposable Commlink, Fake SIN [1] +Fake Licence [1], Local Area Mapsoft, Bug Scanner [6], Tag Eraser, 10x Plastic Restraints, 2x Stim Patch [4], Trauma Patch
Vision/Audio Enhancement Cost:6225¥ Avail:12R Package:Contacts [2] +Imagelink, Flare Compensation, Glasses [4] + Lowlight or Thermo, Smartlink, Vision Enhancement [2], Ear Buds [3] +Audio Enhancement [3]
Thermoptic Camouflage Cost:8925¥ Avail:10R Package:Camo Suit [9+2] +Feedback, Thermal Damping [5], Non-conductivity [4], Helmet +Imagelink, Camera [3] +Lowlight, Flare Compensation, Smartlink, Rapelling Gloves
B&E Kit Cost:15600¥ Avail:12F Package:Electronics Tool Kit, MonoSaw, Autopicker [4], Sequencer [4], Maglock Passkey [4], Keycard Copier [6]
Surveillance Kit Cost:3650¥ Avail:12 Package:Handheld Housing [2] +Camera [3] w Lowlight & Thermo, Vision Magnification +Directional Mic [3] w Select Sound Filter [3], 5x Stealth RFID Locator Tags, 5x Sensor RFID Tags +Omni-directional Mic
Some other packages that might be useful: street scum survival kit, typical
runner sidearm, basic commlink package...they need to be useful to more than one character concept and are about time saving and not needing to remember every little piece of equipment that you would expect a competant runner to have access to.