The so-called "one ca‍§♦rd" is to realize the int ↓elligent management ∞£of many different functions on ¶×∞÷the same card. Essentia≤¶<lly, it is a special information mana±∏→gement system compose€§Ω"d of cards, appliance≥ ★s and higher-level management s&®↕±oftware. Its core content is to use c↔ ÷ards, a specific physical m απ​edium, to realize the st∏'andardization and automation ←‍πof information resource man≥↑γagement from the generation, collectio∑∑≥n, transmission of business da¥×ta to summary analysis. At the☆₽ same time, as a part of enterp£♠§rise information managem•‍↑φent, enterprise all-in₽σ-one card is closely related to enter₹σprise's ERP syst∞<₩em, financial system and HR syst$ em.

According to the card's media, ♦∑it is divided into read✘±-only and read-write. The rea‌σ∑d-only card generally uses the Iβ÷‍©D number on the card to ₽¶‍realize identity authentication, and >£♣$performs data interaction in the backgr∏​≈∏ound, such as a magnetic stripe card '₩♠barcode card, a PVC card with<≤  an ID number, and a contactless IC c€↔•★ard (RFID radio frequenc×£y card) . The read-write card has a w↕ ♣≤ide range of applications. Th₹¥e card can be used as an™® identity authentication ID and can a α‍♦lso be written to the card. The readδ↔-write card, that is,>‍ the IC card, is dividγ∏ed into contact and non-contact. Theβ§ non-contact card is today and later.±₽♦± The mainstream. A non-contact I♥∏C card is a radio frequency (RFIC) π card with a built-in chip. Taking β×≥the Philips Mifare card as an exam&®φ≠ple, it consists of mul$→↓≠tiple read and writeγ"$ sectors that can be encr&₩≈∏ypted, stored, read, and rewritten€φ≠. Today's radio frequency card te Ω£chnology has developed to the CP•Ωε←U card stage. In addition to encryptio×€∞$n, storage, reading, π'•₽and rewriting, it also h±™ ₹as computing and dynamic e≤↓αncryption functions. C₩λ™₩PU cards are the mainstream  ≥↔in the future. The SIM/UIM card of the♣• mobile phone is int₽≥<egrated with the radio frequ♠♥♦☆ency technology to form a newλ∞§' medium, that is, the mob€£ile phone card.

The card can be divided into t₩₩≤♥hree categories: consumption manageme♠ ¶nt applications, ide★ ♦ntity recognition applications, ₩<and energy saving and enviro ☆↓δnmental protection applications. ∏↑®Consumption management applicati✘✔÷™ons such as: canteen sales systeγ'₩"m, member consumption management β×system, parking lot charging man©↔π♠agement system, computer rβγ≠γoom on-board management system, gym≠♦ management system, librar≥ y management system, etc.; idγΩentification applications such as: acce↓♠&ss control system, attendance syst←♠$em, Elevator credit ≈♥$card control system, shuttle mana§§βgement system, etc.; energy-savin™±∏₽g and environmental protection appλ≈♦lications such as: water contro ↕l management system, temper₩βature control management system, electr✔πic control management system,>≠ etc.